This document defines key terms related to pathology including types of cell changes (hypertrophy, hyperplasia, atrophy, metaplasia), types of cell death (necrosis, apoptosis, autophagy), inflammation processes (leukocyte recruitment, chemotaxis, reactive oxygen species), immunity and hypersensitivity reactions, neoplasia and tumor characteristics (anaplasia, metastasis), and hematologic disorders (anemia, leukemias, myelodysplastic syndromes).
This document discusses neoplasia and provides definitions and classifications of different types of tumors. Some key points include:
- Neoplasms can be classified as benign or malignant based on their ability to invade surrounding tissues and metastasize. Malignant tumors are less differentiated.
- Epithelial tumors are further classified based on cell of origin and growth pattern (e.g. adenoma, papilloma, polyp). Mesenchymal tumors are classified as sarcomas.
- Environmental and genetic factors can affect cancer risk and distribution. Cancer incidence generally increases with age. Certain inherited syndromes confer higher cancer susceptibility.
- Precancerous conditions like dysplasia are characterized by cellular
This document defines and describes different types of embolism. It states that an embolism is a detached solid, liquid, or gas mass carried by the bloodstream to a distant site. It then lists and provides details on various types of embolisms including venous (pulmonary), arterial, paradoxical, fat, amniotic fluid, air, and septic embolisms. For pulmonary embolisms, it notes they most commonly arise from deep vein thromboses in the legs and can cause further recurrent embolic episodes. It also provides information on symptoms and causes of fat, air, and amniotic fluid embolisms.
Disturbances of Circulation (Pathology)Osama Zahid
This document discusses disturbances of circulation, including hyperemia and edema. It defines hyperemia as the active or passive engorgement of vascular beds, and describes physiologic and pathologic types. Passive hyperemia, also called congestion, is caused by decreased outflow of blood. The effects of acute and chronic general and local passive hyperemia are outlined through descriptions of gross and microscopic appearances. Edema is defined as the abnormal accumulation of fluid in interstitial tissues or body cavities.
Emphysema is a lung disease characterized by breakdown of lung tissue and alveoli, reducing the lungs' ability to exchange oxygen. There are three main types: centrilobular emphysema primarily affects the center of lung lobes and is usually caused by smoking; panlobular emphysema affects all alveoli and is associated with genetic deficiencies; paraseptal emphysema relates to changes near the pleura. Diagnosis involves imaging, lung function tests, and blood tests to assess oxygen levels. Treatment focuses on medications, pulmonary rehabilitation, and sometimes surgery to improve breathing and quality of life.
This document discusses transudate and exudate, types of edema fluid. Transudate results from increased hydrostatic pressure or decreased plasma proteins, causing protein-poor fluid to accumulate. Exudate occurs due to increased vascular permeability in inflammatory conditions, producing protein-rich fluid. The main differences between transudate and exudate are that transudate is clear and serous with low protein, cells and LDH, while exudate is cloudy/purulent with high protein, cells including neutrophils, and LDH. Transudate results from non-inflammatory causes while exudate occurs due to inflammation.
This document provides information about endocarditis, including:
- Endocarditis is an inflammation of the inner lining of the heart and heart valves. It is commonly caused by a heart valve infection from microorganisms entering the bloodstream.
- It is classified as either acute or subacute based on symptoms and causative organisms. Common causative organisms include streptococci, staphylococci, and enterococci.
- Risk factors include age over 50, pre-existing heart conditions, IV drug use, and dental procedures. Diagnosis involves blood cultures, echocardiogram, and application of the Modified Duke Criteria. Treatment involves antibiotics targeting the causative organism along with possible surgery
An embolism is the obstruction of blood vessels by a mass or clot that has detached from its origin and traveled through the bloodstream. Embolisms can be classified based on the material causing the obstruction and the source and direction of blood flow. Common types of embolisms include pulmonary, fat, air, amniotic fluid, and tumor embolisms. Pulmonary embolisms originate in the lower leg veins and are caused by stasis, hypercoagulability, or a saddle embolism. Fat embolisms result from trauma or medical conditions and obstruct arterioles and capillaries. Decompression sickness is a form of gas embolism that affects scuba divers or caisson workers
1. Hyperemia and congestion refer to localized increases in blood volume within dilated vessels and are associated with edema.
2. Edema occurs when hydrostatic pressure is increased or oncotic pressure is decreased, overwhelming the lymphatic system and causing fluid accumulation in tissues.
3. Common causes of edema include increased venous pressure from heart failure, decreased plasma proteins, lymphatic obstruction, sodium retention, and inflammation.
This document discusses neoplasia and provides definitions and classifications of different types of tumors. Some key points include:
- Neoplasms can be classified as benign or malignant based on their ability to invade surrounding tissues and metastasize. Malignant tumors are less differentiated.
- Epithelial tumors are further classified based on cell of origin and growth pattern (e.g. adenoma, papilloma, polyp). Mesenchymal tumors are classified as sarcomas.
- Environmental and genetic factors can affect cancer risk and distribution. Cancer incidence generally increases with age. Certain inherited syndromes confer higher cancer susceptibility.
- Precancerous conditions like dysplasia are characterized by cellular
This document defines and describes different types of embolism. It states that an embolism is a detached solid, liquid, or gas mass carried by the bloodstream to a distant site. It then lists and provides details on various types of embolisms including venous (pulmonary), arterial, paradoxical, fat, amniotic fluid, air, and septic embolisms. For pulmonary embolisms, it notes they most commonly arise from deep vein thromboses in the legs and can cause further recurrent embolic episodes. It also provides information on symptoms and causes of fat, air, and amniotic fluid embolisms.
Disturbances of Circulation (Pathology)Osama Zahid
This document discusses disturbances of circulation, including hyperemia and edema. It defines hyperemia as the active or passive engorgement of vascular beds, and describes physiologic and pathologic types. Passive hyperemia, also called congestion, is caused by decreased outflow of blood. The effects of acute and chronic general and local passive hyperemia are outlined through descriptions of gross and microscopic appearances. Edema is defined as the abnormal accumulation of fluid in interstitial tissues or body cavities.
Emphysema is a lung disease characterized by breakdown of lung tissue and alveoli, reducing the lungs' ability to exchange oxygen. There are three main types: centrilobular emphysema primarily affects the center of lung lobes and is usually caused by smoking; panlobular emphysema affects all alveoli and is associated with genetic deficiencies; paraseptal emphysema relates to changes near the pleura. Diagnosis involves imaging, lung function tests, and blood tests to assess oxygen levels. Treatment focuses on medications, pulmonary rehabilitation, and sometimes surgery to improve breathing and quality of life.
This document discusses transudate and exudate, types of edema fluid. Transudate results from increased hydrostatic pressure or decreased plasma proteins, causing protein-poor fluid to accumulate. Exudate occurs due to increased vascular permeability in inflammatory conditions, producing protein-rich fluid. The main differences between transudate and exudate are that transudate is clear and serous with low protein, cells and LDH, while exudate is cloudy/purulent with high protein, cells including neutrophils, and LDH. Transudate results from non-inflammatory causes while exudate occurs due to inflammation.
This document provides information about endocarditis, including:
- Endocarditis is an inflammation of the inner lining of the heart and heart valves. It is commonly caused by a heart valve infection from microorganisms entering the bloodstream.
- It is classified as either acute or subacute based on symptoms and causative organisms. Common causative organisms include streptococci, staphylococci, and enterococci.
- Risk factors include age over 50, pre-existing heart conditions, IV drug use, and dental procedures. Diagnosis involves blood cultures, echocardiogram, and application of the Modified Duke Criteria. Treatment involves antibiotics targeting the causative organism along with possible surgery
An embolism is the obstruction of blood vessels by a mass or clot that has detached from its origin and traveled through the bloodstream. Embolisms can be classified based on the material causing the obstruction and the source and direction of blood flow. Common types of embolisms include pulmonary, fat, air, amniotic fluid, and tumor embolisms. Pulmonary embolisms originate in the lower leg veins and are caused by stasis, hypercoagulability, or a saddle embolism. Fat embolisms result from trauma or medical conditions and obstruct arterioles and capillaries. Decompression sickness is a form of gas embolism that affects scuba divers or caisson workers
1. Hyperemia and congestion refer to localized increases in blood volume within dilated vessels and are associated with edema.
2. Edema occurs when hydrostatic pressure is increased or oncotic pressure is decreased, overwhelming the lymphatic system and causing fluid accumulation in tissues.
3. Common causes of edema include increased venous pressure from heart failure, decreased plasma proteins, lymphatic obstruction, sodium retention, and inflammation.
Polycythemia is an abnormally increased concentration of red blood cells or hemoglobin in the blood. There are several types including primary, secondary, relative, and stress polycythemia. Symptoms result from increased blood volume and viscosity and include fatigue, headache, and shortness of breath. Diagnosis involves blood tests showing elevated red blood cell count, hemoglobin, and hematocrit levels. Treatment may include phlebotomy to reduce blood volume, medications to decrease blood cell production, and lifestyle changes like exercise and avoiding tobacco. Nursing care focuses on monitoring for blood clots, administering treatments, providing skin care and pain management.
This document discusses infarcts, which are areas of ischemic necrosis caused by occlusion of the arterial supply or venous drainage. It defines infarcts and lists common causes like thrombotic occlusion. It describes different types of infarcts based on color, age, and presence of infection. Pathogenesis involves local hyperemia, edema, hemorrhage, and cellular changes leading to necrosis replaced by fibrous tissue. Gross morphology shows wedge-shaped areas pointing toward the occluded vessel. Microscopy shows coagulative necrosis and inflammatory reaction at the periphery replaced by fibrous tissue. Commonly affected organs and outcomes are also outlined.
Cell injury and Cellular Adaptation: PathologyHarshit Jadav
This document discusses various types of cell injury, including reversible and irreversible injury. It outlines several causes of cell injury, such as hypoxia, physical agents, chemicals/drugs, microbial agents, immunologic agents, and nutritional derangements. The document also discusses various cellular adaptations that cells undergo in response to stress, including atrophy, hypertrophy, hyperplasia, metaplasia, and dysplasia. Overall, the document provides an overview of the different forms of cell injury, causes of injury, and adaptive cellular responses.
Bronchiectasis is a chronic lung disease characterized by irreversible dilation of the bronchi. It results from damage to the airways due to infection or inflammation that impairs mucus clearance. Common symptoms include chronic cough with sputum production. Diagnosis involves chest imaging and sputum culture. Treatment aims to clear secretions, treat infections, and manage symptoms. Nursing care focuses on airway clearance techniques, breathing exercises, infection control, nutrition support, and health education.
Oedema, also called hydrops, results from an accumulation of excess fluid in the interstitial spaces or body cavities due to diseases rather than being a disease itself. It can be generalized affecting the entire body or localized to certain areas. The causes of oedema include problems with the veins, heart, liver, kidneys, lymphatics, hormones, nutrition, and inflammation which increase hydrostatic pressure, decrease plasma oncotic pressure, obstruct lymphatic drainage, or cause sodium and water retention leading to excess fluid build up.
Arteriosclerosis is a condition characterized by thickening, hardening, and remodeling of the arterial wall. It is caused by factors like hypertension, diabetes, smoking, obesity, and age. The pathology involves fibro-muscular thickening of the arterial wall from the fetal stage onwards. There are different types including senile and hypertensive arteriosclerosis. Symptoms depend on the location of arterial narrowing and can include chest pain, leg pain, headaches, and others. Investigations include Doppler tests, MRI angiography, CT angiography, and regular angiography. Treatment involves managing risk factors medically or surgically through procedures like angioplasty, endarterectomy, and bypass surgery. Physical therapy focuses on
This document discusses infarction, which is localized ischemic necrosis of tissue due to decreased blood supply. Infarction can be caused by thrombi, emboli, vasospasm, expansion of atheroma, extrinsic compression of vessels, vessel twisting, or traumatic vessel rupture. There are three main types of infarction: red (hemorrhagic), white (anemic), and septic. Factors that influence infarction development include vulnerability to hypoxia, blood oxygen content, rate of occlusion, and blood supply. Myocardial, pulmonary, and cerebral infarctions are provided as examples and their characteristics and outcomes described.
This document discusses leukopenia, a condition characterized by a reduced number of white blood cells. It identifies several potential causes of leukopenia, including viral and bacterial infections, cancers, autoimmune disorders, malnutrition, and bone marrow diseases. Symptoms of leukopenia include increased risk of infection. The document outlines methods for diagnosing leukopenia via blood tests and bone marrow biopsy and treatments such as chemotherapy, radiation, or bone marrow transplant. It recommends lifestyle practices like rest, good hygiene and nutrition to help prevent infection for those with leukopenia.
Pathology is the study and diagnosis of disease. It has four main components: the cause or etiology, the mechanism of development/pathogenesis, structural alterations to cells (morphological changes), and the consequences of these changes (clinical manifestations). Pathology has evolved from autopsy and organ-based examination to cellular pathology and now utilizes various techniques including molecular pathology, genetics, immunology, and quantitative analysis. Key techniques used in pathology include autopsy, biopsy, cytology, animal experimentation, tissue/cell culture, histology, immunohistochemistry, electron microscopy, flow cytometry, image analysis, and molecular biology techniques like PCR and DNA sequencing.
This document discusses various types of cellular adaptations: atrophy, hypertrophy, hyperplasia, metaplasia, dysplasia. Atrophy is a reduction in cell size and number. Hypertrophy is an increase in cell size but not number. Hyperplasia is an increase in cell number. Metaplasia is a change from one adult cell type to another. Dysplasia refers to abnormal cell shapes and sizes that can progress to cancer. Cellular adaptations provide clues for pathologists to diagnose disease.
This document provides an overview of pathology, including its definition and branches. Pathology is defined as the study and diagnosis of disease through examination of organs, tissues, bodily fluids, and whole bodies. The main branches of pathology discussed are general pathology, anatomical pathology, cytopathology, surgical pathology, forensic pathology, and clinical/laboratory pathology. The document also covers topics such as roots/suffixes/prefixes, cellular adaptation/injury, reversible vs. irreversible injury, necrosis, and apoptosis.
This presentation summarizes inflammation and its causes, types, signs, and treatments. It defines inflammation as the body's response to tissue damage and infection, characterized by pain, redness, swelling and loss of function. Acute inflammation has a rapid onset and lasts a few days, while chronic inflammation persists long-term. Causes include burns, chemicals, infections, and physical injury. Treatment involves anti-inflammatory foods like tomatoes and fish or drugs like paracetamol, aspirin and ibuprofen to reduce inflammation and speed healing.
Polycythemia is a condition characterized by an abnormal increase in red blood cells. It can be primary, caused by bone marrow abnormalities, or secondary, caused by factors like smoking or lung diseases that result in hypoxia. Symptoms include headache, dizziness, and skin redness or itching. Diagnosis involves blood tests showing elevated red blood cell counts. Treatment may include phlebotomy to reduce blood volume, medications to suppress blood cell production, and lifestyle changes like exercise and avoiding tobacco. Nursing care focuses on monitoring for blood clots, managing pain and nutrition, and providing education.
Edema can be caused by increased hydrostatic pressure, increased vascular permeability, decreased colloid osmotic pressure, decreased protein synthesis or increased protein loss, or lymphatic obstruction. The major mechanisms are increased hydrostatic pressure, as seen in congestive heart failure, or increased vascular permeability during inflammation. Edema fluid is usually a protein-poor transudate when caused by hydrostatic or oncotic pressure changes, but is a protein-rich exudate with inflammatory causes due to higher vascular permeability.
Basic Pathology : Introduction To Cells & Tissue DamageSado Anatomist
This document provides an overview of pathology, cell and tissue damage. It defines pathology as the study of diseases and discusses basic terminology like etiology, pathogenesis, diagnosis and clinical manifestation. It also describes different types of cellular adaptation like atrophy, hypertrophy and hyperplasia in response to injury. The document outlines the stages and types of necrosis, or cell death, as well as various causes of cell injury such as oxygen deprivation, chemicals, infections, immune reactions and physical trauma.
Systemic effects of acute inflammation and granulomaDr. Hadia Arshad
Inflammation is the protective immune response to tissue injury or infection. It involves movement of fluid and immune cells into injured tissues and is characterized by redness, swelling, heat, pain, and loss of function. The systemic inflammatory response causes fever, increased pulse and blood pressure, and changes in white blood cell counts. Chronic inflammation lasts longer and involves macrophages and lymphocytes, often leading to fibrosis, proliferation of blood vessels, and necrosis. Granulomatous inflammation forms structures called granulomas, which contain giant cells, to wall off long-term infections or foreign materials.
This document defines atrophy and discusses its causes and prevention. It begins by defining atrophy as a decrease in size of an organ resulting from a decrease in both the number and size of cells. It then discusses the microscopic and macroscopic signs of atrophy and the cellular changes that occur. The document classifies atrophy into physiological types, such as the natural atrophy of certain organs with age, and pathological types caused by factors like starvation, loss of innervation, pressure, ischemia, or decreased workload. It concludes by recommending a healthy diet, regular exercise, avoiding smoking, and changing positions frequently to prevent atrophic changes.
Emphysema is a lung disease that causes damage to the air sacs in the lungs called alveoli, resulting in shortness of breath. It is usually caused by smoking or long-term exposure to irritants or pollutants. As the disease progresses, the alveoli are destroyed, reducing the lungs' ability to take in oxygen. Symptoms start mild but worsen over time, ultimately causing severe shortness of breath and respiratory failure if left untreated. Treatment focuses on quitting smoking, medications, surgery, pulmonary rehabilitation, and managing symptoms.
Thrombosis is the formation of a blood clot or thrombus within a blood vessel. Virchow's triad describes the key factors that predispose to thrombosis: endothelial injury, altered blood flow, and hypercoagulability. Thrombosis occurs through platelet activation and aggregation, and activation of the coagulation cascade following vascular injury. Thrombi can cause ischemic injury by blocking blood flow or thromboembolism by dislodging and blocking vessels downstream. The fate of a thrombus includes resolution, organization, propagation or thromboembolism.
This document summarizes the key differences between acute and chronic inflammation. Acute inflammation is an initial rapid response to injury or infection that involves increased blood flow and immune cell infiltration. It is typically short-lived and resolves within days. Chronic inflammation is a prolonged response lasting weeks or longer that can cause ongoing tissue damage. It involves different immune cells and may have no obvious symptoms, increasing risk for serious diseases like cancer if left unaddressed.
200 POINTS TO RMEMBER IN GENERAL PATHOLOGY - DR EJAZ WARIS Ejaz Waris
This document provides 200 important points and definitions related to general pathology. It covers topics such as inflammation, necrosis, apoptosis, hypersensitivity reactions, immune responses, and characteristics of different types of tumors and cancers. The points define processes like hypertrophy, atrophy, metaplasia, chemotaxis, and the roles of cytokines, chemokines, and other mediators in the inflammatory response. Cancer-related topics include oncogenes, tumor markers, types of hypersensitivity reactions, and characteristics of squamous cell carcinoma and adenocarcinoma.
Polycythemia is an abnormally increased concentration of red blood cells or hemoglobin in the blood. There are several types including primary, secondary, relative, and stress polycythemia. Symptoms result from increased blood volume and viscosity and include fatigue, headache, and shortness of breath. Diagnosis involves blood tests showing elevated red blood cell count, hemoglobin, and hematocrit levels. Treatment may include phlebotomy to reduce blood volume, medications to decrease blood cell production, and lifestyle changes like exercise and avoiding tobacco. Nursing care focuses on monitoring for blood clots, administering treatments, providing skin care and pain management.
This document discusses infarcts, which are areas of ischemic necrosis caused by occlusion of the arterial supply or venous drainage. It defines infarcts and lists common causes like thrombotic occlusion. It describes different types of infarcts based on color, age, and presence of infection. Pathogenesis involves local hyperemia, edema, hemorrhage, and cellular changes leading to necrosis replaced by fibrous tissue. Gross morphology shows wedge-shaped areas pointing toward the occluded vessel. Microscopy shows coagulative necrosis and inflammatory reaction at the periphery replaced by fibrous tissue. Commonly affected organs and outcomes are also outlined.
Cell injury and Cellular Adaptation: PathologyHarshit Jadav
This document discusses various types of cell injury, including reversible and irreversible injury. It outlines several causes of cell injury, such as hypoxia, physical agents, chemicals/drugs, microbial agents, immunologic agents, and nutritional derangements. The document also discusses various cellular adaptations that cells undergo in response to stress, including atrophy, hypertrophy, hyperplasia, metaplasia, and dysplasia. Overall, the document provides an overview of the different forms of cell injury, causes of injury, and adaptive cellular responses.
Bronchiectasis is a chronic lung disease characterized by irreversible dilation of the bronchi. It results from damage to the airways due to infection or inflammation that impairs mucus clearance. Common symptoms include chronic cough with sputum production. Diagnosis involves chest imaging and sputum culture. Treatment aims to clear secretions, treat infections, and manage symptoms. Nursing care focuses on airway clearance techniques, breathing exercises, infection control, nutrition support, and health education.
Oedema, also called hydrops, results from an accumulation of excess fluid in the interstitial spaces or body cavities due to diseases rather than being a disease itself. It can be generalized affecting the entire body or localized to certain areas. The causes of oedema include problems with the veins, heart, liver, kidneys, lymphatics, hormones, nutrition, and inflammation which increase hydrostatic pressure, decrease plasma oncotic pressure, obstruct lymphatic drainage, or cause sodium and water retention leading to excess fluid build up.
Arteriosclerosis is a condition characterized by thickening, hardening, and remodeling of the arterial wall. It is caused by factors like hypertension, diabetes, smoking, obesity, and age. The pathology involves fibro-muscular thickening of the arterial wall from the fetal stage onwards. There are different types including senile and hypertensive arteriosclerosis. Symptoms depend on the location of arterial narrowing and can include chest pain, leg pain, headaches, and others. Investigations include Doppler tests, MRI angiography, CT angiography, and regular angiography. Treatment involves managing risk factors medically or surgically through procedures like angioplasty, endarterectomy, and bypass surgery. Physical therapy focuses on
This document discusses infarction, which is localized ischemic necrosis of tissue due to decreased blood supply. Infarction can be caused by thrombi, emboli, vasospasm, expansion of atheroma, extrinsic compression of vessels, vessel twisting, or traumatic vessel rupture. There are three main types of infarction: red (hemorrhagic), white (anemic), and septic. Factors that influence infarction development include vulnerability to hypoxia, blood oxygen content, rate of occlusion, and blood supply. Myocardial, pulmonary, and cerebral infarctions are provided as examples and their characteristics and outcomes described.
This document discusses leukopenia, a condition characterized by a reduced number of white blood cells. It identifies several potential causes of leukopenia, including viral and bacterial infections, cancers, autoimmune disorders, malnutrition, and bone marrow diseases. Symptoms of leukopenia include increased risk of infection. The document outlines methods for diagnosing leukopenia via blood tests and bone marrow biopsy and treatments such as chemotherapy, radiation, or bone marrow transplant. It recommends lifestyle practices like rest, good hygiene and nutrition to help prevent infection for those with leukopenia.
Pathology is the study and diagnosis of disease. It has four main components: the cause or etiology, the mechanism of development/pathogenesis, structural alterations to cells (morphological changes), and the consequences of these changes (clinical manifestations). Pathology has evolved from autopsy and organ-based examination to cellular pathology and now utilizes various techniques including molecular pathology, genetics, immunology, and quantitative analysis. Key techniques used in pathology include autopsy, biopsy, cytology, animal experimentation, tissue/cell culture, histology, immunohistochemistry, electron microscopy, flow cytometry, image analysis, and molecular biology techniques like PCR and DNA sequencing.
This document discusses various types of cellular adaptations: atrophy, hypertrophy, hyperplasia, metaplasia, dysplasia. Atrophy is a reduction in cell size and number. Hypertrophy is an increase in cell size but not number. Hyperplasia is an increase in cell number. Metaplasia is a change from one adult cell type to another. Dysplasia refers to abnormal cell shapes and sizes that can progress to cancer. Cellular adaptations provide clues for pathologists to diagnose disease.
This document provides an overview of pathology, including its definition and branches. Pathology is defined as the study and diagnosis of disease through examination of organs, tissues, bodily fluids, and whole bodies. The main branches of pathology discussed are general pathology, anatomical pathology, cytopathology, surgical pathology, forensic pathology, and clinical/laboratory pathology. The document also covers topics such as roots/suffixes/prefixes, cellular adaptation/injury, reversible vs. irreversible injury, necrosis, and apoptosis.
This presentation summarizes inflammation and its causes, types, signs, and treatments. It defines inflammation as the body's response to tissue damage and infection, characterized by pain, redness, swelling and loss of function. Acute inflammation has a rapid onset and lasts a few days, while chronic inflammation persists long-term. Causes include burns, chemicals, infections, and physical injury. Treatment involves anti-inflammatory foods like tomatoes and fish or drugs like paracetamol, aspirin and ibuprofen to reduce inflammation and speed healing.
Polycythemia is a condition characterized by an abnormal increase in red blood cells. It can be primary, caused by bone marrow abnormalities, or secondary, caused by factors like smoking or lung diseases that result in hypoxia. Symptoms include headache, dizziness, and skin redness or itching. Diagnosis involves blood tests showing elevated red blood cell counts. Treatment may include phlebotomy to reduce blood volume, medications to suppress blood cell production, and lifestyle changes like exercise and avoiding tobacco. Nursing care focuses on monitoring for blood clots, managing pain and nutrition, and providing education.
Edema can be caused by increased hydrostatic pressure, increased vascular permeability, decreased colloid osmotic pressure, decreased protein synthesis or increased protein loss, or lymphatic obstruction. The major mechanisms are increased hydrostatic pressure, as seen in congestive heart failure, or increased vascular permeability during inflammation. Edema fluid is usually a protein-poor transudate when caused by hydrostatic or oncotic pressure changes, but is a protein-rich exudate with inflammatory causes due to higher vascular permeability.
Basic Pathology : Introduction To Cells & Tissue DamageSado Anatomist
This document provides an overview of pathology, cell and tissue damage. It defines pathology as the study of diseases and discusses basic terminology like etiology, pathogenesis, diagnosis and clinical manifestation. It also describes different types of cellular adaptation like atrophy, hypertrophy and hyperplasia in response to injury. The document outlines the stages and types of necrosis, or cell death, as well as various causes of cell injury such as oxygen deprivation, chemicals, infections, immune reactions and physical trauma.
Systemic effects of acute inflammation and granulomaDr. Hadia Arshad
Inflammation is the protective immune response to tissue injury or infection. It involves movement of fluid and immune cells into injured tissues and is characterized by redness, swelling, heat, pain, and loss of function. The systemic inflammatory response causes fever, increased pulse and blood pressure, and changes in white blood cell counts. Chronic inflammation lasts longer and involves macrophages and lymphocytes, often leading to fibrosis, proliferation of blood vessels, and necrosis. Granulomatous inflammation forms structures called granulomas, which contain giant cells, to wall off long-term infections or foreign materials.
This document defines atrophy and discusses its causes and prevention. It begins by defining atrophy as a decrease in size of an organ resulting from a decrease in both the number and size of cells. It then discusses the microscopic and macroscopic signs of atrophy and the cellular changes that occur. The document classifies atrophy into physiological types, such as the natural atrophy of certain organs with age, and pathological types caused by factors like starvation, loss of innervation, pressure, ischemia, or decreased workload. It concludes by recommending a healthy diet, regular exercise, avoiding smoking, and changing positions frequently to prevent atrophic changes.
Emphysema is a lung disease that causes damage to the air sacs in the lungs called alveoli, resulting in shortness of breath. It is usually caused by smoking or long-term exposure to irritants or pollutants. As the disease progresses, the alveoli are destroyed, reducing the lungs' ability to take in oxygen. Symptoms start mild but worsen over time, ultimately causing severe shortness of breath and respiratory failure if left untreated. Treatment focuses on quitting smoking, medications, surgery, pulmonary rehabilitation, and managing symptoms.
Thrombosis is the formation of a blood clot or thrombus within a blood vessel. Virchow's triad describes the key factors that predispose to thrombosis: endothelial injury, altered blood flow, and hypercoagulability. Thrombosis occurs through platelet activation and aggregation, and activation of the coagulation cascade following vascular injury. Thrombi can cause ischemic injury by blocking blood flow or thromboembolism by dislodging and blocking vessels downstream. The fate of a thrombus includes resolution, organization, propagation or thromboembolism.
This document summarizes the key differences between acute and chronic inflammation. Acute inflammation is an initial rapid response to injury or infection that involves increased blood flow and immune cell infiltration. It is typically short-lived and resolves within days. Chronic inflammation is a prolonged response lasting weeks or longer that can cause ongoing tissue damage. It involves different immune cells and may have no obvious symptoms, increasing risk for serious diseases like cancer if left unaddressed.
200 POINTS TO RMEMBER IN GENERAL PATHOLOGY - DR EJAZ WARIS Ejaz Waris
This document provides 200 important points and definitions related to general pathology. It covers topics such as inflammation, necrosis, apoptosis, hypersensitivity reactions, immune responses, and characteristics of different types of tumors and cancers. The points define processes like hypertrophy, atrophy, metaplasia, chemotaxis, and the roles of cytokines, chemokines, and other mediators in the inflammatory response. Cancer-related topics include oncogenes, tumor markers, types of hypersensitivity reactions, and characteristics of squamous cell carcinoma and adenocarcinoma.
Shock results from the failure of the cardiovascular system to provide sufficient blood circulation.
To maintain circulatory homeostasis the following mechanisms must be present –
1. a functioning of heart to circulate blood .
A sufficient amount of blood volume .
The capability of the vascular system , accommodating blood flow to the capillaries and returning to the right side of the heart.
Acute inflammation is the early response of tissue to injury and is characterized by changes in the microcirculation such as increased fluid exudation and leukocyte emigration from blood vessels to the injured area. It is typically short in duration and aims to remove the injurious agent. The major causes include infections, tissue necrosis, foreign bodies, and burns. Acute inflammation exhibits cardinal signs of pain, heat, redness, swelling, and loss of function and involves vascular changes like increased permeability and blood flow as well as cellular components like leukocytes that release inflammatory mediators. The morphological patterns of acute inflammation depend on the type and extent of tissue response. Outcomes range from resolution to fibrosis, abscess formation, or progression to
Vasculitis refers to inflammation of blood vessels. The document discusses the classification, pathogenesis, clinical manifestations, investigations, and histopathology of various types of vasculitis. It classifies vasculitis based on vessel size (large, medium, small vessel) and cause (primary, secondary to infection, drugs, etc). Pathogenesis may involve infectious or non-infectious mechanisms like immune complex deposition, ANCA, or anti-endothelial cell antibodies. Investigations assess organ damage, immune mechanisms, and provide tissue diagnosis. Clinical features and histopathology vary depending on the type and organs involved in the vasculitis.
Inflammation is the body's response to eliminate injurious agents and damaged tissue. The four cardinal signs of inflammation are redness, swelling, heat, and pain. Inflammation can be classified as acute, chronic, or subacute based on its duration and the host's defense capacity. Acute inflammation involves fluid accumulation, platelet activation, and neutrophil infiltration within 2 weeks to repair tissue. Chronic inflammation lasts a long time and involves lymphocytes, plasma cells, and macrophages with granulation tissue formation. The inflammatory response involves vascular changes like vasodilation, increased permeability and leukocyte migration, as well as cellular events like phagocytosis to remove pathogens and debris.
INTRODUCTION
HISTORY
CAUSES OF INFLAMMATION
CLASSIFICATION
ACUTE INFLAMMATION
CHEMICAL MEDIATORS OF INFLAMMATION
OUTCOMES OF ACUTE INFLAMMATION
CHRONIC INFLAMMATION
INFLAMMATORY DISEASES
REFERENCES
This document describes inflammation, including its causes, mechanisms, and effects. It defines acute and chronic inflammation and outlines the vascular and cellular events of acute inflammation. This includes increased blood flow, vascular permeability, exudation of fluid, and migration of neutrophils. It also discusses the various chemical mediators involved, such as histamine, prostaglandins, leukotrienes, and cytokines. These mediators cause effects like vasodilation, increased permeability, and chemotaxis. The document notes both local and potential systemic manifestations of inflammation, such as fever, acute phase response, and changes in white blood cell count.
Inflammation is the body's response to injury or infection and is characterized by redness, swelling, heat, and pain. It can be acute, occurring rapidly with a short duration, or chronic, with a longer, insidious onset. Acute inflammation is driven by increased blood flow and vascular permeability, allowing fluid, proteins, and immune cells like neutrophils to enter tissues. This causes swelling and activates immune responses like phagocytosis of pathogens. Chronic inflammation is prolonged, features mononuclear immune cell infiltration, and can cause simultaneous tissue destruction and healing over weeks to years. Macrophages play a key role by releasing enzymes and radicals that damage tissues but also promote healing through proliferation of new blood vessels and connective tissue.
Chronic inflammation is inflammation of prolonged duration that involves ongoing active inflammation, tissue injury, and simultaneous healing. It can be caused by persistent infections, prolonged exposure to toxic agents, or autoimmunity. Morphologically, it is characterized by infiltration of mononuclear cells like macrophages, lymphocytes, and plasma cells, as well as ongoing tissue destruction and attempts at repair through angiogenesis and fibrosis. Chronic inflammation involves recruitment and accumulation of macrophages from the blood and their activation, leading to effects like increased cytokine production. Other cells like mast cells, lymphocytes, plasma cells, and eosinophils may also be present. Granulomatous inflammation features collections of macrophages that form granulomas. Chronic inflammation can also cause systemic effects through the acute
Inflammation and wound healing is a complex process involving several steps. It begins with an acute inflammatory response triggered by injury or infection, characterized by redness, swelling, heat and pain. This response involves increased vascular permeability, migration of white blood cells, and release of chemical mediators. Over time, the inflammatory response transitions to a chronic phase involving lymphocytes and macrophages. Wound healing occurs through regeneration or repair, involving re-epithelialization, granulation tissue formation, collagen deposition and wound contraction. Primary healing closes wounds through direct apposition of wound edges, while secondary healing relies on granulation tissue to fill open wounds.
The document discusses several autoimmune diseases including systemic lupus erythematosus, rheumatoid arthritis, Sjögren's syndrome, systemic sclerosis, and mixed connective tissue disease. It provides details on the pathogenesis, clinical features, immunological characteristics, and morphology of these conditions. Autoimmune diseases result from a loss of tolerance to self-antigens and can involve deregulated immune responses against tissues and organs, leading to inflammation and damage.
This document summarizes the key aspects of inflammation. It begins by defining inflammation and describing the cardinal signs. It then discusses the etiological factors, types of inflammation (acute vs chronic), and the haemodynamic and cellular events in acute inflammation. Specifically, it outlines the vascular changes, increased permeability, exudation of leukocytes, and process of phagocytosis. It also discusses the chemical mediators of inflammation like histamine, kinins, cytokines, prostaglandins, and the resolution of inflammation. Finally, it concludes that inflammation is an important immune response but better understanding its pathways could aid in treating diseases.
This document provides an overview of shock, including its definition, types, etiology, pathogenesis, stages, and pathophysiological changes. It discusses the classification of shock into types such as hypovolemic, septic, traumatic, neurogenic, and distributive shock. For septic shock specifically, it covers the etiology as severe infection, pathophysiology involving the immune response and release of toxins, and key features including hypotension, tissue hypoperfusion, and high mortality rates. Treatment focuses on fluid resuscitation and source control for hypovolemic and septic shock.
This document discusses inflammation and healing. It defines inflammation as the local response of living tissues to injury. The causes of inflammation can be exogenous, such as physical or chemical agents, or endogenous like circulation disorders or metabolic products. The classic signs of inflammation are redness, swelling, heat, and pain. Acute inflammation involves rapid onset and short duration, while chronic inflammation has insidious onset and longer duration. Acute inflammation is characterized by increased blood flow, vascular permeability, and leukocyte infiltration. Chronic inflammation features infiltration by mononuclear cells like macrophages and lymphocytes, along with simultaneous tissue destruction and healing.
1. Inflammation is the body's response to infection, irritation, or injury, characterized by redness, swelling, heat, and pain. It involves the immune system and blood vessels.
2. Acute inflammation is a short-term response to recent injury or infection, marked by increased blood flow, blood vessel permeability, and migration of white blood cells. Chronic inflammation is a long-term response involving lymphocytes, macrophages, and fibrosis.
3. Inflammation can resolve, lead to abscess or fibrosis, and is mediated by chemical signals like histamine, bradykinin, prostaglandins, and cytokines. Different cell types and patterns characterize specific inflammatory diseases.
This document summarizes several autoimmune diseases including their causes, features, and impact on organs. It discusses how a dysfunctional immune system can lead to autoimmunity through a lack of tolerance against self-antigens. Key autoimmune diseases covered include systemic lupus erythematosus, rheumatoid arthritis, Sjögren's syndrome, and systemic sclerosis. The summary provides morphological and clinical details about each disease and how they impact organs like the skin, joints, and internal systems.
This document provides an overview of inflammation, including its historical aspects, classification, acute inflammation process, mediators, morphological patterns, and outcomes. It discusses the vascular events and cellular events of acute inflammation, including haemodynamic changes, altered vascular permeability, exudation of leukocytes, and phagocytosis. It also covers increased lymph flow, release of soluble mediators, and the physiological symptoms and responses of inflammation.
Inflammation is the reaction of living tissues to all forms of injury.
Inflammation is essentially a protective response intended to destroy invading microorganism inactivate toxins and to achieve healing and repair.
Inflammation is a protective immune vascular response that involves immune cells, blood vessels, and molecular mediators. The purpose of inflammation is to eliminate the initial cause of cell injury, clear out necrotic cells and tissues damaged from the original insult and the inflammatory process, and to initiate tissue repair.
This document provides an overview of inflammation and repair. It begins with the historical context of inflammation and defines the cardinal signs. It then discusses the types of inflammation as acute or chronic, depending on duration. Acute inflammation involves vascular and cellular events like increased permeability and leukocyte migration. Mediators of inflammation include cytokines, the clotting system, kinin system, and complement system. Chronic inflammation is characterized by mononuclear cell infiltration and long-term tissue destruction. Healing and repair occurs through regeneration of tissues or repair via granulation tissue formation and wound contraction.
The complement system is a collection of soluble proteins and membrane receptors that function in host defense against microbes and inflammatory reactions. It consists of more than 20 proteins numbered C1 through C9. The complement system works through three pathways - classical, lectin, and alternative - that ultimately activate C3 and C5 convertases, cleaving C3 and C5 into fragments that opsonize pathogens, induce inflammation, and form the membrane attack complex to lyse microbes. Complement activation is tightly regulated by inhibitory proteins to prevent damage to host cells. Deficiencies in complement proteins can increase susceptibility to certain infections.
Phagocytosis is the process by which leukocytes and macrophages eliminate microbes and dead cells. It involves recognition of the microbes or dead cells by phagocytic receptors, attachment, engulfment through pseudopod formation and plasma membrane extension, and killing through reactive oxygen species, reactive nitrogen species, and lysosomal enzymes released inside the phagosome. Antioxidants and anti-proteases help regulate the killing process.
Free radicals are highly reactive chemical entities with unpaired electrons that can be toxic under some conditions. There are several types of free radicals including oxygen, sulfur, carbon, and nitrogen centered radicals. Free radicals are formed by either losing or gaining a single electron from a non-radical species and play a role in oxidative stress through reactions like the Fenton reaction.
Cell injury can be reversible or irreversible. Reversible injury results in cellular swelling and fat accumulation but the cell can return to normal function. Irreversible injury leads to necrosis and apoptosis and the cell cannot be treated or recover. Reversible injury is caused by a lack of oxygen or chemicals and results in cellular swelling and fatty changes visible as lipid vacuoles in the cytoplasm. Irreversible injury is caused by prolonged stress and results in cell death.
This document discusses the key functions and components of healthy cells, including metabolism, organelles, cytoskeleton, cell-cell interactions, growth factors and receptors, the cell cycle, and stem cells. It explains that cells rely on fundamental housekeeping functions like nutrient production and transport, communication, movement, renewal, and waste breakdown. Specific organelles support metabolism, energy generation, protein synthesis, steroid synthesis, protein modification, and cellular regulation. The cytoskeleton, composed of actin, intermediate filaments and microtubules, gives cells their shape and ability to move. Growth factors stimulate genes for cell growth and division. The tightly regulated cell cycle results in cell division through development and tissue maintenance. Stem cells can differentiate and renew
Special stains in dermato pathology - final copyariva zhagan
This document provides an overview of various special stains used in dermatopathology. It begins by explaining what stains are and their uses, such as enhancing contrast and examining tissues. It then describes the major categories of stains including those for carbohydrates, lipids, microorganisms, connective tissues, and minerals. Specific stains are also outlined, like PAS for glycogen and fungi, Masson's Trichrome for collagen, and Gram staining for bacteria identification. The document concludes by stating several stains used for visualizing structures like mast cells, amyloid, and various microbes under the microscope.
This document discusses the role of immunohistochemistry (IHC) in diagnosing soft tissue tumours. It begins by defining soft tissue and the WHO classification of soft tissue tumours. IHC is an important ancillary technique that can be used to identify discrete tissue components using antigen-antibody binding. The document outlines the IHC protocol and discusses various markers that can help diagnose different types of soft tissue tumours, including markers for fibroblastic, adipocytic, vascular, neural, osseous and cartilaginous tumours. Specific markers and the tumours they are useful for identifying are provided. The document emphasizes that IHC should be used along with other techniques as markers sometimes show cross-reactivity.
This document summarizes various types of renal failure including acute renal failure and chronic kidney disease. It discusses the etiology, pathogenesis and phases of acute tubular necrosis. It also covers chronic glomerulonephritis and specific conditions like membranous nephropathy, membranoproliferative glomerulonephritis, focal segmental glomerulosclerosis, IgA nephropathy, and diabetic nephropathy. The document provides details on urine analysis findings, histopathology techniques like immunofluorescence and electron microscopy in the evaluation of renal diseases.
Refractory anemia is a subtype of myelodysplastic syndrome characterized by non-responsiveness to conventional anemia treatment. It is defined by less than 5% blasts in the bone marrow and less than 1% in the peripheral blood. Refractory anemia involves dysplasia primarily affecting the erythroid lineage. Evaluation includes blood counts, peripheral smear, bone marrow biopsy and cytogenetic testing to confirm the diagnosis and guide prognosis. Management focuses on treating the anemia and related symptoms.
This document describes the steps involved in tissue processing from fixation to embedding in wax. It discusses obtaining fresh specimens, fixation in formalin, dehydration through an alcohol series, clearing in xylene, infiltration and embedding in paraffin wax. Sections are then cut on a microtome, mounted on slides and stained, usually with hematoxylin and eosin, to visualize tissue structures microscopically. Proper processing is important to preserve tissue morphology and produce high quality stained sections for diagnostic examination.
This document discusses poorly differentiated neoplasms and provides details about medulloblastoma and meningioma. It notes that medulloblastoma is the most common poorly differentiated brain tumor in children, occurring in the cerebellum. Meningiomas predominantly arise from meningeal cells and can be benign or atypical/anaplastic. The document also covers prion diseases like Creutzfeldt-Jakob disease, which causes rapid dementia and is characterized by spongiform changes in the brain due to misfolded prion proteins.
Polycythemia is a blood disorder characterized by an increased red blood cell count. There are two main types: primary polycythemia vera, which is a stem cell cancer caused by a JAK2 mutation; and secondary polycythemia, caused by inappropriate erythropoietin secretion in response to conditions like high altitudes or lung/heart diseases. Polycythemia vera symptoms include headache, itching, fatigue and bleeding risks. Diagnosis involves blood tests showing increased red blood cells, hematocrit, and hemoglobin levels along with a bone marrow biopsy. Treatment focuses on phlebotomy and medications to reduce red blood cell counts.
Nutritional disease can result from protein energy malnutrition (PEM), which is caused by inadequate intake of proteins and calories. PEM leads to deficiencies in digestion/absorption and loss of fat, muscle tissue, and weight. It has multiple etiologies including poverty, infections, illness, alcoholism, and ignorance. PEM is a serious, often lethal condition especially in children under 5 years old. It is diagnosed by body mass index, skin fold thickness, mid-arm circumference, and serum proteins. The two main types are marasmus, characterized by weight loss and depletion of muscle, and kwashiorkor, which occurs when protein deprivation exceeds calorie deficit and results in edema, skin lesions, and fatty liver.
This document lists various pediatric infections organized by the body system affected. It includes respiratory infections caused by adenovirus, rhinovirus, and influenza that can cause upper and lower respiratory tract infections. It also lists digestive infections such as mumps, rotavirus, norovirus, and hepatitis viruses that can cause gastroenteritis. Additionally, it mentions systemic infections affecting the skin like measles, rubella, and varicella zoster that cause rubeola, German measles, and chickenpox/shingles.
Paroxysmal nocturnal hemoglobinuria (PNH) is a rare blood disorder caused by a genetic defect involving the PIGA gene. This results in a lack of certain proteins that normally protect red blood cells from being destroyed by the immune system. During sleep, when pressures in blood vessels are lower, the red blood cells are more vulnerable to destruction, leading to hemoglobin in the urine and anemia. Diagnosis involves blood and urine tests and can be confirmed via flow cytometry. Treatment options include stem cell transplantation.
A paraneoplastic syndrome is a disease or symptom that is caused by cancer but is not due to direct involvement of cancer cells. They occur in 10-15% of cancer patients and are typically seen in lung, breast, ovarian, and lymphoma cancers. Paraneoplastic syndromes can be endocrine, neurological, mucocutaneous, or hematological in nature. Common endocrine paraneoplastic syndromes include Cushing syndrome, SIADH, hypercalcemia, hypoglycemia, polycythemia, hyperaldosteronism, and carcinoid syndrome, which result from hormones or cytokines secreted by tumor cells.
This document discusses ovarian germ cell tumors. It describes that germ cell tumors constitute 15-20% of ovarian tumors and are derived from primitive germ cells. They are classified as mature teratomas, immature teratomas, or monodermal tumors. Mature teratomas are benign cysts containing tissues from all germ layers, while immature teratomas are malignant with embryonic or fetal tissues. Specific germ cell tumors discussed include dermoid cysts, dysgerminomas, yolk sac tumors, and choriocarcinomas. Risk factors, morphology, microscopy, and other characteristics are provided for each tumor type.
Nutritional disease refers to protein energy malnutrition (PEM), which results from inadequate intake of proteins and calories. PEM causes deficiencies in digestion and absorption, resulting in loss of fat, muscle tissue, weight loss and general weakness. PEM is a serious and often lethal condition, especially in children under 5 years old. It has various etiologies including poverty, infections, illness, alcoholism and dietary restrictions. PEM is diagnosed using measurements like body mass index, mid-arm circumference and serum protein levels. The two main types are marasmus, characterized by weight loss and muscle depletion, and kwashiorkor, distinguished by edema and hypoalbuminemia.
This document discusses myeloproliferative disorders (MPDs), including polycythemia vera, essential thrombocythemia, and primary myelofibrosis. MPDs are clonal stem cell disorders characterized by excessive proliferation of one or more myeloid cell lineages. Common features include increased proliferation, extramedullary hematopoiesis, marrow fibrosis, and peripheral blood cytopenias. The document then provides more detailed descriptions of polycythemia vera, essential thrombocythemia, and primary myelofibrosis, including their definitions, pathogeneses involving mutations, morphologies, clinical features, complications, investigations, and treatments.
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Pathology definitions
1. PATHOLOGY DEFINITIONS
PATHOLOGY:
Is the study (logos) of disease (pathos, suffering)
HYPERTROPHY:
Hypertrophy is an increase in the sizeof cells resulting in increase in the
sizeof the organ.
HYPERPLASIA:
Increased number of cells
ATROPHY:
Shrinkagein the sizeof the cell by the loss of cell substanceis known as
atrophy
METAPLASIA:
Metaplasia is a reversible changein which one adult cell type (epithelial or
mesenchymal) is replaced by another adult cell type
NECROSIS:
Necrosis is the type of cell death that is associated with loss Of membrane
integrity and leakage of cellular contents culminating In dissolution of cells,
largely resulting from the Degradativeaction of enzymes on lethally injured cells
APOPTOSIS:
Apoptosis is a pathway of cell death in which cells activate Enzymes that
degrade the cells own nuclear DNA and nuclear And cytoplasmic proteins
2. AUTOPHAGY:
Refers to lysosomaldigestion of the cell’s own components.
FATTY CHANGE (STEATOSIS) :
Fatty changerefers to any abnormalaccumulation of triglycerides within
parenchymalcells
CELLULAR AGING:
Progressivedeclinein the life span and functional capacity of cells.
INFLAMMATION:
Inflammation is a protective responseinvolving hostcells, blood vessels,
and proteins and other mediators that is intended to eliminate the initial cause of
Cell injury, as well as the necrotic cells and tissues resulting from the original
insult, and to initiate the process of repair.
LEUKOCYTE RECRUITMENT:
Leukocytes normally flow rapidly in the blood, and in inflammation, they
have to be stopped and broughtto the offending agent or the site of tissue
damage, which are typically outside the Vessels
MARGINATION:
Process of leukocyte accumulation at the periphery of vessels
CHEMOTAXIS:
After extravasating fromthe blood, leukocytes movetoward sites of
infection or injury along a chemical gradient
3. REACTIVEOXYGEN SPECIES:
ROS are synthesized via the NADPH oxidase (phagocyte oxidase) pathway
and are released fromneutrophils and macrophages that are activated by
microbes, immune complexes, cytokines, and a variety of other inflammatory
Stimuli
COMPLEMENTSYSTEM:
Consists of plasma proteins that play an important role in host defense
(immunity) and inflammation
GRANULOMA:
Characterized by aggregates of activated macrophages with scattered
lymphocytes
STEM CELLS:
Defined as thosehave self-renewalcapacity and asymmetric replication property
GROWTH FACTORS:
Growth factors areproteins that stimulate the survivaland Proliferation of
particular cells, and may also promote migration, Differentiation, and other
cellular responses
ANGIOGENESIS:
Angiogenesis is the process of new blood vesseldevelopment from existing
vessels, primarily venules
4. FIBROSIS:
To denote the excessive deposition of collagen and other ECM components
in a tissue
HEMOSTASIS:
Is the process of blood clotting that prevents excessivebleeding after blood
vesseldamage
HYPEREMIA:
Increasein blood volume within a tissue – active process
CONGESTION:
Increasein blood volume within a tissue – passiveprocess
HEMORRHAGE:
Defined as the extravasation of blood from vessels, occurs in a variety of
settings
PETECHIAE:
Minute (1 to 2 mm in diameter) hemorrhages into skin, mucous
membranes, or serosalsurfaces
PURPURA:
Slightly larger (3 to 5 mm) hemorrhages.
ECCHYMOSES:
Larger (1 to 2 cm) subcutaneous hematomas
5. HEMOSTASIS:
Comprises a series of regulated processes thatmaintain blood in a fluid,
clot-free state in normalvessels while rapidly forming a localized hemostatic plug
at the site of vascular injury
COAGULATIONCASCADE:
Is a successiveseries of amplifying enzymatic reactions. At each step in the
process, a proenzymeis proteolyzed to become an active enzyme, which in turn
proteolysis the next proenzymein the series, eventually leading to the activation
of thrombin and the formation of fibrin
THROMBOSIS ((CALLED VIRCHOW’S TRIAD):
(1) Endothelial injury, (2) Stasis or turbulent blood flow, and
(3) Hypercoagulability of the blood
EMBOLISM:
An embolus is an intravascular solid, liquid, or gaseous mass that is carried
by the blood to a site distant fromits point of origin.
INFARCTION:
An infarctis an area of ischemic necrosis caused by occlusion of the
vascular supply to the affected tissue
SHOCK:
Is characterized by systemic hypo perfusion of tissues; it can be caused by
diminished cardiac output or by reduced effective circulating blood volume. The
Consequences are impaired tissueperfusion and cellular hypoxia
6. IMMUNITY:
Refers to protection againstinfections, and the immune systemis the
collection of cells and molecules that are responsiblefor defending the body
against the countless pathogenic microbes in the environment
HYPERSENSITIVITY:
Injurious immunereactions are grouped as hypersensitivity.
AUTOIMMUNITY:
Reactions against self-antigens
IMMEDIATE(TYPEI) HYPERSENSITIVITY:
Immediate hypersensitivity is a tissuereaction that occurs rapidly (typically
within minutes) after the interaction of antigen with IgEantibody that is bound to
the surfaceof mast cells in a sensitized host
(TYPE II HYPERSENSITIVITY) :
Antibody-mediated (typeII) hypersensitivity disorders are caused by
antibodies directed against target antigens on the surfaceof cells or other tissue
components.
(TYPE III HYPERSENSITIVITY) :
Antigen–antibody (immune) complexes that are formed in the circulation
may depositin blood vessels, leading to complement activation and acute
inflammation.
7. T CELL–MEDIATED (TYPE IV) HYPERSENSITIVITY:
Several autoimmune disorders, as wellas pathologic reactions to
environmental chemicals and persistent microbes, arenow known to be caused
by T cells.
IMMUNOLOGIC TOLERANCE:
Immunologic tolerance is unresponsiveness to an antigen that is induced by
exposureof specific lymphocytes to that antigen
RHEUMATOID ARTHRITIS:
Rheumatoid arthritis (RA) is a systemic, chronic inflammatory disease
affecting many tissues but principally attacking the joints to producea
nonsuppurativeproliferative synovitis thatfrequently progresses to destroy
Articular cartilage and underlying bone with resulting disabling arthritis
SJÖGRENSYNDROME:
Sjögren syndromeis a clinicopathologic entity characterized by dry eyes
(keratoconjunctivitis sicca) and dry mouth (xerostomia), resulting fromimmune-
mediated destruction of the lacrimal and salivary glands.
SYSTEMIC SCLEROSIS (SCLERODERMA) :
Systemic sclerosis (SS) is an immunologic disorder characterized by
excessivefibrosis in multiple tissues, obliterative vascular disease, and evidence
of autoimmunity, mainly the production of multiple autoantibodies
AMYLOIDOSIS:
Amyloidosis is a condition associated with a number of inherited and
inflammatory disorders in which extracellular deposits of fibrillar proteins are
responsiblefor tissue damageand functional compromise
8. NEOPLASIA:
Is an abnormal mass of tissue, the growth of which exceeds and it’s
uncoordinated with that of the normaltissues and persistin the same excessive
manner after cessation of the stimuli which evoked the changes.
Modernera: Disorder of cell growth that is triggered by a series of acquired
mutations affecting a single cell and its clonal progeny
ANAPLASIA:
Refers to a lack of differentiation in neoplastic cells.
METASTASIS:
Metastases are secondary implants of a tumor that are discontinuous with
the primary tumor and located in remote tissues
FETAL HYDROPS:
Refers to the accumulation of edema fluid in the fetus during intrauterine
growth
OBESITY:
Defined as a state of increased body weight, due to adipose tissue
accumulation, that is of sufficient magnitude to produceadversehealth effects
ATHEROSCLEROSIS:
Is characterized by the presence of intimal lesions called atheroma’s (or
atheromatous or atherosclerotic plaques). Atheromatous plaques are raised
lesions composed of softlipid cores (mainly cholesterol and cholesterol esters,
with necrotic debris) covered by fibrous caps
9. ANEURYSMS:
Congenital or acquired dilations of blood vessels or the heart
AORTIC DISSECTION:
Aortic dissection occurs when blood splays apartthe laminar planes of the
media to forma blood-filled channel within the aortic wall
VASCULITIS:
Is a general term for vesselwall inflammation.
VARICOSE VEINS:
Abnormally dilated tortuous veins produced by chronically increased
intraluminal pressures and weakened vesselwall support.
ISCHEMIC HEARTDISEASE:
Is a broad term encompassing several closely related syndromes caused by
myocardialischemia— an imbalance between cardiac blood supply (perfusion)
and myocardialoxygen and nutritional requirements
ANEMIA:
Is defined as a reduction in the oxygen-transporting capacity of blood,
which usually stems froma decrease in the red cell mass to subnormal levels
MEANCELL VOLUME (MCV) :
Average volumeper red cell, expressed in femtoliters (cubic microns)
10. MEANCELL HEMOGLOBIN(MCH):
The average mass of hemoglobin per red cell, expressed in pictograms
MEANCELL HEMOGLOBINCONCENTRATION (MCHC):
The average concentration of hemoglobin in a given volumeof packed red
cells, expressed in grams per deciliter
RED CELL DISTRIBUTIONWIDTH (RDW):
The coefficient of variation of red cell volume
APLASTIC ANEMIA:
Is a disorder in which multipotent myeloid stem cells are suppressed,
leading to bone marrow failureand pancytopenia
HODGKIN LYMPHOMA:
Encompasses a distinctive group of neoplasms that are characterized by the
presenceof a tumor giant cell, the Reed-Sternberg cell
MYELOID NEOPLASMS:
Arisefrom hematopoietic progenitors and typically give riseto clonal
proliferations that replace normal bone marrow cells
LEUKEMIAS:
With involvement of the bone marrow and the peripheral blood
ACUTE LEUKEMIAS:
Are malignant clonal disorders originating in hematopoietic stem cells
characterized by the proliferation of poorly differentiated blast (immature cells) in
the bone marrow & rapidly progressiveto fatal if untreated.
11. MYLODYSPLASTIC SYNDROMES:
Are a heterogeneous groups of acquired clonal stem cell disorders
characterized by occurrencein the elderly persons, dysplasia oneor more
hematopoietic cell lineage, ineffective erythropoiesis, increased risk of
transformation in to acute myeloid leukemia’s.
MYELOPROLIFERATIVEDISOEDERS:
Are the clonal neoplastic disorders of pluripotent hematopoietic stem cell
characterized by excessiveproliferation of one or more of the myeloid cell lines
like granulocytic, erythroid, megakaryocytic.
POLYCYTHEMIA VERA:
Is a myeloproliferativedisorder characterized by trilineage hyperplasia in
bone marrow with predominant involvement of erythroid series
PRIMARY MYELOFIBROSIS:
Is a clonal myeloproliferativeneoplasm characterized by trilineage
proliferation in bone marrow , reactive bone marrow fibrosis and extra medullary
hematopoiesis.
ESSENTIAL THROMBOCYTHAEMIA:
Is a clonal myeloproliferativedisorder characterized by marked
proliferation of megakaryocytes in bone marrow causing thrombocytosis in the
peripheral blood.
CHRONIC LYMPHOCYTIC LEUKAEMIA:
CLL is a neoplastic disorder characterized by monoclonal proliferation of
immunologically incompetent slowly dividing mature B lymphocyte.
12. HAIRY CELL LEUKEMIA:
Is a rare chronic lymphoproliferativedisorder of B cell origin characterized
by pancytopenia, splenic enlargement & hairy cells in bone marrow and other
sites.
PLASMA CELL DYSCRASIAS:
Also called paraproteinaemias or monoclonalgammopathies are a group of
disorders characterized by neoplastic proliferation of plasma cells & increased
production of a single homogeneous immunoglobulin
LYMPHOMAS:
Are a heterogeneous group of malignant neoplasms which originate
primarily in lymph node or other lymphoid tissues.
INFECTOIUS MONONUCLEOSIS:
Is an acute infectious disease caused by EBV characterized by fever,
pharyngitis, lymphadenopathy, atypical lymphocytosis
DIC:
Is caused by the systemic activation of coagulation and results in the
formation of thrombi throughoutthe microcirculation. As a consequence,
platelets and coagulation factors areconsumed and, secondarily, fibrinolysis is
activated
ACUTE RESPIRATORY DISTRESS SYNDROME:
Acute respiratory distress syndrome(ARDS) is a clinical syndromecaused by
diffusealveolar capillary and epithelial damage. The usual courseis characterized
by rapid onset of life-threatening respiratory insufficiency, cyanosis, and severe
arterial hypoxemia that is refractory to oxygen therapy and may progress to
multisystemorgan failure
13. EMPHYSEMA:
Is characterized by abnormalpermanent enlargement of the air spaces
distal to the terminal bronchioles, accompanied by destruction of their walls
without significantfibrosis.
CHRONIC BRONCHITIS:
Itis defined by the presence of a persistentproductivecough for at least 3
consecutivemonths in at least 2 consecutive years.
ASTHMA:
Asthma is a chronic inflammatory disorder of the airways thatcauses
recurrentepisodes of wheezing, breathlessness, chesttightness, and cough,
particularly at night and/or early in the morning. The hallmarks of the disease are
intermittent and reversibleairway obstruction, chronic bronchial inflammation
with eosinophils, bronchialsmooth muscle cell hypertrophy and hyper reactivity,
and increased mucus secretion
BRONCHIECTASIS:
Is the permanent dilation of bronchi and bronchioles caused by destruction
of the muscle and the supporting elastic tissue, resulting fromor associated with
chronic necrotizing infections
SARCOIDOSIS:
Is a multisystem diseaseof unknown etiology characterized by
noncaseating granulomas in many tissues and organs
NEPHRITIC SYNDROME:
Is a clinical complex, usually of acute onset, characterized by (1) Hematuria
with dysmorphic red cells and red cell casts in the urine; (2) Some degree of
oliguria and azotemia; and (3) Hypertension
14. THROMBOTIC MICROANGIOPATHY:
Refers to lesions seen in various clinical syndromes characterized
morphologically by widespread thrombosis in the microcirculation and clinically
by microangiopathic hemolytic anemia, thrombocytopenia, and, in certain
instances, renal failure
LEUKOPLAKIA:
A White patch or plaque that cannot be scraped off and cannot be
characterized clinically or pathologically as any other disease.