Cell blocks in cytol (iac wrkshp i) 5 11-10vshidham
The document summarizes a workshop on cell blocks in cytopathology. It discusses the role of cell blocks in evaluating cytopathology specimens and managing patient care. It outlines different methods for preparing cell blocks and key issues to consider for each specimen type. Immunophenotyping using cell blocks and the SCIP approach are also summarized. Several case studies are presented to demonstrate cell block applications.
Cell blocks provide diagnostic information in addition to regular cytology slides. They allow examination of histological structure and use of ancillary tests like special stains and immunohistochemistry. A cell block is prepared by concentrating cells from cytology specimens using various methods like centrifugation or thrombin clotting. This allows cells to be processed and examined like histology samples. Cell blocks improve diagnostic accuracy for body fluids and fineneedle aspiration samples. They are useful for identifying primary tumor sites, distinguishing reactive from malignant cells, and enabling molecular testing.
Cell blocks provide tissue fragments from FNA specimens that are processed into paraffin blocks. This allows examination of histological structure and use of ancillary tests like immunohistochemistry. Cell blocks increase diagnostic sensitivity and specificity compared to cytology alone. They require minimal effort and preserve tissue for second opinions without losing the original smears. The document discusses FNAC and cell block techniques, materials used, advantages like increased cellularity and diagnostic yield, and importance of clinical information for optimal diagnosis.
Handout for Round table #19 at American Society of Cytopathology (Nov 9, 2013...vshidham
This document outlines Vinod Shidham's presentation on cell blocks. It begins with an introduction to cell blocks and their role in cytopathological evaluation and patient management. It describes various methods for preparing cell blocks from different specimen types and highlights critical issues to consider, such as specimen cellularity and intended ancillary tests. The document discusses aligning cells along the cutting surface and depth of section cutting to improve immunophenotyping on cell blocks. It presents the subtractive coordinate immunoreactivity pattern approach for effusion immunocytochemistry and concludes with several case studies.
Round table #19 at American Society of Cytopathology (Nov 5, 2012, Las Vegas,...vshidham
This document discusses cell blocks for molecular tests and immunocytochemistry applications. It begins with an overview of cell blocks and their role in bridging cytology and histopathology. It then discusses various methods for preparing cell blocks from different specimen types, noting critical issues to consider like specimen cellularity and anticipated ancillary tests. The document also covers immunophenotyping using cell blocks and challenges like antigen loss. It presents an approach called SCIP for immunocytochemistry of effusions. Finally, it indicates there will be a discussion of study cases using cell blocks.
This document discusses cell blocks, liquid based cytology, and the Bethesda system for reporting cervical cytology. It defines cell blocks and describes their advantages like allowing histological examination and ancillary tests. It outlines the advantages and disadvantages of liquid based cytology compared to conventional pap smears. Finally, it explains the Bethesda system for standardized reporting of cervical cytology results, including categories for negative, epithelial abnormalities, organisms, and other non-neoplastic findings.
The document discusses the history, utility, and methods of preparing cell blocks from fine needle aspiration cytology samples. Cell blocks allow examination of histological structure and use of ancillary tests. Key methods include the fixed sedimentation method using a 1:1 ratio of 100% alcohol and 40% formalin, the plasma thrombin method using equal parts plasma and thrombin, and the bacterial agar method using 3% agar. Cell blocks provide increased diagnostic sensitivity and specificity compared to cytology alone through examination of tissue architecture and ability to perform special stains and molecular testing.
Cell blocks in cytol (iac wrkshp i) 5 11-10vshidham
The document summarizes a workshop on cell blocks in cytopathology. It discusses the role of cell blocks in evaluating cytopathology specimens and managing patient care. It outlines different methods for preparing cell blocks and key issues to consider for each specimen type. Immunophenotyping using cell blocks and the SCIP approach are also summarized. Several case studies are presented to demonstrate cell block applications.
Cell blocks provide diagnostic information in addition to regular cytology slides. They allow examination of histological structure and use of ancillary tests like special stains and immunohistochemistry. A cell block is prepared by concentrating cells from cytology specimens using various methods like centrifugation or thrombin clotting. This allows cells to be processed and examined like histology samples. Cell blocks improve diagnostic accuracy for body fluids and fineneedle aspiration samples. They are useful for identifying primary tumor sites, distinguishing reactive from malignant cells, and enabling molecular testing.
Cell blocks provide tissue fragments from FNA specimens that are processed into paraffin blocks. This allows examination of histological structure and use of ancillary tests like immunohistochemistry. Cell blocks increase diagnostic sensitivity and specificity compared to cytology alone. They require minimal effort and preserve tissue for second opinions without losing the original smears. The document discusses FNAC and cell block techniques, materials used, advantages like increased cellularity and diagnostic yield, and importance of clinical information for optimal diagnosis.
Handout for Round table #19 at American Society of Cytopathology (Nov 9, 2013...vshidham
This document outlines Vinod Shidham's presentation on cell blocks. It begins with an introduction to cell blocks and their role in cytopathological evaluation and patient management. It describes various methods for preparing cell blocks from different specimen types and highlights critical issues to consider, such as specimen cellularity and intended ancillary tests. The document discusses aligning cells along the cutting surface and depth of section cutting to improve immunophenotyping on cell blocks. It presents the subtractive coordinate immunoreactivity pattern approach for effusion immunocytochemistry and concludes with several case studies.
Round table #19 at American Society of Cytopathology (Nov 5, 2012, Las Vegas,...vshidham
This document discusses cell blocks for molecular tests and immunocytochemistry applications. It begins with an overview of cell blocks and their role in bridging cytology and histopathology. It then discusses various methods for preparing cell blocks from different specimen types, noting critical issues to consider like specimen cellularity and anticipated ancillary tests. The document also covers immunophenotyping using cell blocks and challenges like antigen loss. It presents an approach called SCIP for immunocytochemistry of effusions. Finally, it indicates there will be a discussion of study cases using cell blocks.
This document discusses cell blocks, liquid based cytology, and the Bethesda system for reporting cervical cytology. It defines cell blocks and describes their advantages like allowing histological examination and ancillary tests. It outlines the advantages and disadvantages of liquid based cytology compared to conventional pap smears. Finally, it explains the Bethesda system for standardized reporting of cervical cytology results, including categories for negative, epithelial abnormalities, organisms, and other non-neoplastic findings.
The document discusses the history, utility, and methods of preparing cell blocks from fine needle aspiration cytology samples. Cell blocks allow examination of histological structure and use of ancillary tests. Key methods include the fixed sedimentation method using a 1:1 ratio of 100% alcohol and 40% formalin, the plasma thrombin method using equal parts plasma and thrombin, and the bacterial agar method using 3% agar. Cell blocks provide increased diagnostic sensitivity and specificity compared to cytology alone through examination of tissue architecture and ability to perform special stains and molecular testing.
The document discusses various techniques for preparing cell blocks (CBs) from cytology specimens such as effusions, fine needle aspirations, and scrapings. Traditional methods involved using a celloidin or agar embedding medium but newer automated techniques using filters and cassettes provide higher cellularity. CBs allow morphological examination and ancillary studies to improve diagnostic accuracy compared to smears alone. While useful, CBs require more material and time than smears and may lack sufficient cells for all tests.
FNA is a procedure used to obtain cell samples from organs without cutting into tissue. It involves using thin needles and suction to collect cell samples. Originally developed in the 1930s, it has become more precise with improved imaging technologies. Performing FNA requires knowledge of anatomy, physical exam skills, understanding normal and abnormal cell appearances, and ensuring proper handling and preparation of samples. It has become a common low-risk procedure to diagnose cancers and other diseases without major surgery.
This document provides information about fine needle aspiration cytology (FNAC). It begins with an introduction to cytopathology and cytology. FNAC is described as the modern method of obtaining cells rather than tissue samples using fine needles. The document outlines the procedure for FNAC including needle and syringe selection, sample collection techniques, slide preparation methods, and staining. Important criteria for analyzing samples such as nuclear/cytoplasmic ratios, chromatin patterns, and cytoplasmic features are also mentioned.
Laser scanning cytometry and liquid based cytologyanaonline
Liquid based cytology (LBC) has been introduced to improve cervical screening. It uses a liquid preservative instead of smearing cells directly on a slide. This allows automated processing to disperse cells and transfer them evenly to a slide. LBC reduces sampling errors, improves cell preservation and slide quality compared to conventional smears. However, it requires specialized equipment and is more expensive. Laser scanning cytometry is a technique that can analyze individual cells from LBC samples. It provides quantitative measurements and complements flow cytometry by allowing analysis of adherent cells and solid tissues.
This document discusses exfoliative cytology, a technique used to examine shed cells from body surfaces. It provides a definition, history of the technique including its use in oral examinations, indications and contraindications. Details are given on methodology including sites for smears, materials, staining techniques and analysis. Recent trends incorporating devices like ViziLite and OralCDx that aid in visualizing and collecting cells are summarized. Advantages like being minimally invasive and disadvantages like inability to diagnose submucosal lesions are highlighted.
The document discusses cell blocks, which are used in cytopathology to provide tissue samples from fluid specimens for histological examination. Cell blocks allow for maintaining tissue architecture, performing ancillary tests, and archiving samples. Various cell block preparation methods are described. Cell blocks provide diagnostic advantages over smears for certain tumor types and body fluids. While cell blocks increase diagnostic accuracy, some methods can result in low cellularity or inadequate samples for ancillary testing. Overall, the document provides an overview of the utility and methods of cell block preparation in cytopathology.
FNAC is a technique where cells are obtained from lesions using a thin needle without surgery. It has several advantages over biopsy as it is a simple, quick, and cost-effective outpatient procedure. Training is required to interpret FNAC samples, which provide information on cell types but not tissue architecture. Complications are minor. FNAC is useful for evaluating palpable and non-palpable masses in various organs and has high sensitivity and specificity compared to histopathology, the gold standard. Proper patient positioning, multiple passes, and smearing techniques help obtain adequate cell samples.
DOI: 10.21276/ijlssr.2016.2.3.15
ABSTRACT- Abnormal cervical cytology includes lesions of the cervix caused due to various infections, hormonal
disturbances, premalignant and malignant conditions. Screening of all the symptomatic women complaining of vaginal
discharge, irregular menstrual bleeding, dyspareunia, post-coital bleeding or post-menopausal bleeding is necessary for
detection and also to pick up any aberration in cervix epithelium i.e. dysplasia or early cervical cancer.
Key-words- Negative for Intraepithelial Lesion or Malignancy, Atypical Squamous Cell of Undetermined Significance,
Low grade Squamous Intraepithelial Lesion, High grade Squamous Intraepithelial Lesion, Squamous Cell Carcinoma
Cervical cytology was introduced by George
Papanicolaou into clinical practice in 1940. In 1945,
the Papanicolaou smear received the endorsement of
the American cancer society as an effective method
for the prevention of cervical cancer .
www.drvikramsaraswat.co.in
www.drsaraswatpathlabs.com
Oral exfoliative cytology is a technique that examines cells collected from the oral mucosa. It can help detect undiagnosed diseases through a simple procedure and confirm suspected diseases without trauma. The document discusses the definition, role, indications, advantages and preparation methods of oral cytology. It describes how to make smears and various staining and fixation techniques used. Cytological classification systems and what normal and abnormal oral cells look like are presented. The uses of oral cytology in detecting oral cancer and newer diagnostic methods like cytomorphometry are also summarized.
This document discusses various staining and preparation techniques used in cytology. It describes the Papanicolaou staining method and factors that can affect staining quality. It also summarizes rapid staining procedures like Diff-Quik and an ultrafast Papanicolaou method. Additionally, it outlines methods to prevent contamination between samples and describes procedures for cell block preparation and imprint cytology smears.
Efficacy of liquid based cytology versus conventional smearsAnamika Dev
This study compares the efficacy of liquid-based cytology (LBC) to conventional smear methods for fine needle aspiration cytology samples. The study analyzed 110 cases of various lesions collected over 2 years. Results showed that LBC produced more clear backgrounds and better preserved and dispersed cells compared to conventional smears. LBC allowed for improved diagnosis of lesions like ductal carcinoma, lymph node metastases, and bone lesions. However, LBC required more processing and had some artifacts that could complicate interpretation. Overall, LBC improved sample quality and reduced inadequate sampling compared to conventional smears.
This document discusses tissue microarrays (TMAs), which allow analysis of hundreds of tissue samples on a single slide. It describes how TMAs are constructed by taking small tissue cores from donor blocks and embedding them in a recipient block. The advantages of TMAs include high throughput analysis and relatively low cost. Various types of TMAs are used for applications like immunohistochemistry, in situ hybridization, and analyzing protein/DNA expression. The document outlines the steps to construct a TMA, including defining the research question, selecting cases, determining core size and number, making a map, and embedding the cores. Quality controls and limitations are also discussed.
03 Presentations III VS (8-47MB)- (3-28-08).ppsvshidham
Part III of Four part symposium: “Diagnostic Cytopathology of Serous Effusion” on April 19, 2007 at Neenah, WI, USA
(2008 Wisconsin Society of Cytology, 40th Anniversary)
Exfoliative cytology is a simple, non-invasive technique introduced by Papanicolau in 1941 that examines shed cells from body surfaces or those harvested by rubbing or brushing tissue. It can be used to study superficial cells from sites like the buccal mucosa, hard palate junction, tongue, and floor of the mouth. Smears are classified from Class I (normal) to Class V (positive for cancer) and indicate whether biopsy is needed. While it is painless and minimally invasive, exfoliative cytology has limitations as malignancies may go undetected and biopsies are still required for definitive diagnoses.
The document presents five case studies demonstrating the utility of cytomorphology in interpreting atypical squamous cells of undetermined significance-cannot exclude high-grade squamous intraepithelial lesion (ASC-H) pap tests. Each case study describes the cytological features of the ASC-H pap test and the follow-up HPV testing results. The document also discusses the application of two-color immunohistochemistry using p16 and Ki-67 markers to help evaluate abnormal cervical cells.
EUS and EUS-FNA are effective techniques for evaluating submucosal lesions. The document reports on a study of 127 submucosal lesions that underwent EUS and EUS-FNA. EUS was able to determine the layer of origin and characteristics of the lesions. EUS-FNA provided a diagnosis in 56 cases and was concordant with the final diagnosis in most cases. EUS and EUS-FNA together allowed accurate diagnosis and differentiation of benign and malignant lesions in this study.
The document discusses various techniques for preparing cell blocks (CBs) from cytology specimens such as effusions, fine needle aspirations, and scrapings. Traditional methods involved using a celloidin or agar embedding medium but newer automated techniques using filters and cassettes provide higher cellularity. CBs allow morphological examination and ancillary studies to improve diagnostic accuracy compared to smears alone. While useful, CBs require more material and time than smears and may lack sufficient cells for all tests.
FNA is a procedure used to obtain cell samples from organs without cutting into tissue. It involves using thin needles and suction to collect cell samples. Originally developed in the 1930s, it has become more precise with improved imaging technologies. Performing FNA requires knowledge of anatomy, physical exam skills, understanding normal and abnormal cell appearances, and ensuring proper handling and preparation of samples. It has become a common low-risk procedure to diagnose cancers and other diseases without major surgery.
This document provides information about fine needle aspiration cytology (FNAC). It begins with an introduction to cytopathology and cytology. FNAC is described as the modern method of obtaining cells rather than tissue samples using fine needles. The document outlines the procedure for FNAC including needle and syringe selection, sample collection techniques, slide preparation methods, and staining. Important criteria for analyzing samples such as nuclear/cytoplasmic ratios, chromatin patterns, and cytoplasmic features are also mentioned.
Laser scanning cytometry and liquid based cytologyanaonline
Liquid based cytology (LBC) has been introduced to improve cervical screening. It uses a liquid preservative instead of smearing cells directly on a slide. This allows automated processing to disperse cells and transfer them evenly to a slide. LBC reduces sampling errors, improves cell preservation and slide quality compared to conventional smears. However, it requires specialized equipment and is more expensive. Laser scanning cytometry is a technique that can analyze individual cells from LBC samples. It provides quantitative measurements and complements flow cytometry by allowing analysis of adherent cells and solid tissues.
This document discusses exfoliative cytology, a technique used to examine shed cells from body surfaces. It provides a definition, history of the technique including its use in oral examinations, indications and contraindications. Details are given on methodology including sites for smears, materials, staining techniques and analysis. Recent trends incorporating devices like ViziLite and OralCDx that aid in visualizing and collecting cells are summarized. Advantages like being minimally invasive and disadvantages like inability to diagnose submucosal lesions are highlighted.
The document discusses cell blocks, which are used in cytopathology to provide tissue samples from fluid specimens for histological examination. Cell blocks allow for maintaining tissue architecture, performing ancillary tests, and archiving samples. Various cell block preparation methods are described. Cell blocks provide diagnostic advantages over smears for certain tumor types and body fluids. While cell blocks increase diagnostic accuracy, some methods can result in low cellularity or inadequate samples for ancillary testing. Overall, the document provides an overview of the utility and methods of cell block preparation in cytopathology.
FNAC is a technique where cells are obtained from lesions using a thin needle without surgery. It has several advantages over biopsy as it is a simple, quick, and cost-effective outpatient procedure. Training is required to interpret FNAC samples, which provide information on cell types but not tissue architecture. Complications are minor. FNAC is useful for evaluating palpable and non-palpable masses in various organs and has high sensitivity and specificity compared to histopathology, the gold standard. Proper patient positioning, multiple passes, and smearing techniques help obtain adequate cell samples.
DOI: 10.21276/ijlssr.2016.2.3.15
ABSTRACT- Abnormal cervical cytology includes lesions of the cervix caused due to various infections, hormonal
disturbances, premalignant and malignant conditions. Screening of all the symptomatic women complaining of vaginal
discharge, irregular menstrual bleeding, dyspareunia, post-coital bleeding or post-menopausal bleeding is necessary for
detection and also to pick up any aberration in cervix epithelium i.e. dysplasia or early cervical cancer.
Key-words- Negative for Intraepithelial Lesion or Malignancy, Atypical Squamous Cell of Undetermined Significance,
Low grade Squamous Intraepithelial Lesion, High grade Squamous Intraepithelial Lesion, Squamous Cell Carcinoma
Cervical cytology was introduced by George
Papanicolaou into clinical practice in 1940. In 1945,
the Papanicolaou smear received the endorsement of
the American cancer society as an effective method
for the prevention of cervical cancer .
www.drvikramsaraswat.co.in
www.drsaraswatpathlabs.com
Oral exfoliative cytology is a technique that examines cells collected from the oral mucosa. It can help detect undiagnosed diseases through a simple procedure and confirm suspected diseases without trauma. The document discusses the definition, role, indications, advantages and preparation methods of oral cytology. It describes how to make smears and various staining and fixation techniques used. Cytological classification systems and what normal and abnormal oral cells look like are presented. The uses of oral cytology in detecting oral cancer and newer diagnostic methods like cytomorphometry are also summarized.
This document discusses various staining and preparation techniques used in cytology. It describes the Papanicolaou staining method and factors that can affect staining quality. It also summarizes rapid staining procedures like Diff-Quik and an ultrafast Papanicolaou method. Additionally, it outlines methods to prevent contamination between samples and describes procedures for cell block preparation and imprint cytology smears.
Efficacy of liquid based cytology versus conventional smearsAnamika Dev
This study compares the efficacy of liquid-based cytology (LBC) to conventional smear methods for fine needle aspiration cytology samples. The study analyzed 110 cases of various lesions collected over 2 years. Results showed that LBC produced more clear backgrounds and better preserved and dispersed cells compared to conventional smears. LBC allowed for improved diagnosis of lesions like ductal carcinoma, lymph node metastases, and bone lesions. However, LBC required more processing and had some artifacts that could complicate interpretation. Overall, LBC improved sample quality and reduced inadequate sampling compared to conventional smears.
This document discusses tissue microarrays (TMAs), which allow analysis of hundreds of tissue samples on a single slide. It describes how TMAs are constructed by taking small tissue cores from donor blocks and embedding them in a recipient block. The advantages of TMAs include high throughput analysis and relatively low cost. Various types of TMAs are used for applications like immunohistochemistry, in situ hybridization, and analyzing protein/DNA expression. The document outlines the steps to construct a TMA, including defining the research question, selecting cases, determining core size and number, making a map, and embedding the cores. Quality controls and limitations are also discussed.
03 Presentations III VS (8-47MB)- (3-28-08).ppsvshidham
Part III of Four part symposium: “Diagnostic Cytopathology of Serous Effusion” on April 19, 2007 at Neenah, WI, USA
(2008 Wisconsin Society of Cytology, 40th Anniversary)
Exfoliative cytology is a simple, non-invasive technique introduced by Papanicolau in 1941 that examines shed cells from body surfaces or those harvested by rubbing or brushing tissue. It can be used to study superficial cells from sites like the buccal mucosa, hard palate junction, tongue, and floor of the mouth. Smears are classified from Class I (normal) to Class V (positive for cancer) and indicate whether biopsy is needed. While it is painless and minimally invasive, exfoliative cytology has limitations as malignancies may go undetected and biopsies are still required for definitive diagnoses.
The document presents five case studies demonstrating the utility of cytomorphology in interpreting atypical squamous cells of undetermined significance-cannot exclude high-grade squamous intraepithelial lesion (ASC-H) pap tests. Each case study describes the cytological features of the ASC-H pap test and the follow-up HPV testing results. The document also discusses the application of two-color immunohistochemistry using p16 and Ki-67 markers to help evaluate abnormal cervical cells.
EUS and EUS-FNA are effective techniques for evaluating submucosal lesions. The document reports on a study of 127 submucosal lesions that underwent EUS and EUS-FNA. EUS was able to determine the layer of origin and characteristics of the lesions. EUS-FNA provided a diagnosis in 56 cases and was concordant with the final diagnosis in most cases. EUS and EUS-FNA together allowed accurate diagnosis and differentiation of benign and malignant lesions in this study.
The document discusses the thyroid FNA procedure and diagnostic categories. It provides details on:
- Performing thyroid FNA under ultrasound guidance using a 25 gauge needle with 3-4 passes.
- Preparing direct smears, cytospins, cell blocks and liquid-based preparations from the aspirated material.
- The Bethesda system for reporting thyroid cytopathology which includes 6 diagnostic categories and their associated cancer risks to guide clinical management.
- Key cytologic features that help diagnose common thyroid lesions and cancers.
Bethesda System for thyroid cytopathologyPrecky Gabuat
This document provides guidelines for classifying thyroid cytopathology samples based on The Bethesda System.
It defines what constitutes an adequate sample and discusses various benign and atypical findings. Samples are classified as nondiagnostic, benign, atypia of undetermined significance, follicular neoplasm, or suspicious for follicular neoplasm based on cellularity, architecture, nuclear features, and the presence of colloid or Hürthle cells. Special circumstances including inflammation, cyst fluid, or abundant colloid can also affect classification. Precise terminology is recommended to communicate cytopathology results.
Cytopathology Conference 10/20/05 - Case 3 tmhsweb
A 13-year-old girl presented with a 3 cm left cheek mass. The differential diagnosis included pleomorphic adenoma and monomorphic adenoma. The diagnosis was determined to be pleomorphic adenoma, the most common salivary gland neoplasm. Pleomorphic adenomas are characterized by variable appearance with epithelial and mesenchymal elements present and a background that can include chondroid, myxoid, or osteoid structures. The stroma is intensely metachromatic and stains bright magenta.
Reporting thyroid fine needle aspiration by the bethesda systemMonika Nema
This document summarizes guidelines for thyroid fine needle aspiration (FNA) cytopathology reports. It discusses classifications including nondiagnostic/unsatisfactory, benign thyroid lesions, atypia of undetermined significance/follicular lesion of undetermined significance, and includes examples of diagnostic criteria, imaging features and recommended reporting language for each classification. Thyroid FNA is presented as an accurate and cost-effective initial test for evaluating thyroid nodules that can help determine if surgery is needed.
The bethesda system for reporting thyroid cytopathologyIndira Shastry
The document describes the Bethesda System for Reporting Thyroid Cytopathology (BSRTC), which was introduced in 2007 to standardize the reporting of thyroid fine needle aspiration (FNA) results. The BSRTC recommends diagnostic categories with implied cancer risks and clinical management guidelines. It provides criteria for adequate samples and defines each diagnostic category, including non-diagnostic, benign, atypia of undetermined significance, follicular neoplasm, suspicious for malignancy, and malignant. The BSRTC aims to improve communication between cytopathologists and clinicians regarding thyroid FNA interpretations and patient management.
color atlas on bethesda system for reporting thyroid cytologyAshish Jawarkar
this is a color atlas on bethesda system for reporting thyroid cytology. there are nearly 300 images in atlas with explanatory text which will help students and practitioners alike. All images are taken from pap society web atlas.. and entire credit for this work should go to the society.. I have put together images available at one place..
THIS IS A PREVIEW ONLY..ENTIRE DOCUMENT IS AVAILABLE ON SCRIBD.. LINK PROVIDED IN DOCUMENT
This document summarizes the key steps in tissue preparation for microscopic analysis:
1) Obtaining a fresh specimen and fixing it to maintain its structure.
2) Dehydrating the tissue by replacing water with alcohol to prepare it for infiltration.
3) Infiltrating the dehydrated tissue with wax by replacing the alcohol with melted paraffin wax.
4) Embedding the infiltrated tissue in wax blocks for sectioning.
Dharamshila Hospital and Research Centre (DHRC) in Delhi, India is the largest cancer hospital in North India with 350 beds. It was established in 1990 and provides comprehensive cancer care including diagnostic, radiation, surgical, chemotherapy, rehabilitation and palliative care services. DHRC has state-of-the-art radiation oncology facilities including two linear accelerators and brachytherapy equipment. It also serves international patients from countries in Asia, Africa, Europe and receives medical camps in African and Middle Eastern countries.
Histopathology specimen processing involves several key steps: specimen identification and labeling, grossing and fixation, processing including dehydration and clearing, embedding, microtomy, and staining. Specimens are examined grossly, relevant sections are selected for histology based on findings, and blocks are prepared for microscopic examination. Proper grossing involves accurate description and oriented sampling to allow for histologic diagnosis.
This document discusses cytopreparatory techniques used in cytopathology. It covers different types of cytology samples like exfoliative cytology obtained from washing, smearing or brushing epithelial surfaces, as well as aspiration cytology using fine needle aspiration. The advantages of cytopathology are described as being non-invasive, allowing for faster reporting to guide clinicians, and being relatively inexpensive. The key steps in cytopreparatory techniques are outlined as specimen evaluation, smear preparation, fixation, and staining. Different fixation methods are also summarized.
Pathology is the study of disease and the associated changes that occur at the cellular, tissue, and organ levels. This leads to signs and symptoms in patients. Pathology examines the causes, structural changes, and symptoms of diseases. Techniques used in pathology include microscopic examination of tissues and organs, histochemistry using special stains, immunohistochemistry to visualize proteins, electron microscopy to study subcellular structures, and biochemical and molecular analysis. The overall aim is to diagnose diseases, determine treatment and prognosis, and contribute to medical research.
This document discusses cytopreparatory techniques for cytology samples. It describes the different types of cytology samples like exfoliative cytology, aspiration cytology, and body fluids. The key steps in cytopreparatory techniques are outlined as evaluation of specimens, preparation of smears, fixation, and staining. Factors that can affect optimal cytological preparation like quality of specimen, fixative used, and stains are also summarized. Different fixation techniques including dry, wet, liquid-based, and lysing fixation for bloody samples are explained.
This document provides information about Frontiers North Adventures, a company that offers expert-guided tours in Canada's north. It discusses the company's core values of being hosts invested in the communities and environments in which they operate. It outlines their marketing channels, including targeting consumers through digital ads and trade shows, and working with media and affinity groups. It also covers their commitment to corporate social responsibility, such as employing local staff, investing in the community, and educational outreach programs. Frontiers North ensures guests experience the wildlife, history, and culture of the north in a sustainable manner.
EUS enables sampling of lesions near the esophagus, stomach, duodenum, and rectum. The document describes a case of EUS-guided FNA of a gastric mass in a woman with weight loss, revealing a GIST. It also details a case of a large pancreatic head mass in a man with pancreatitis, where EUS-FNA obtained a diagnosis of pancreatic cancer. A third case involves EUS evaluation of mediastinal lymph nodes in a man with lung cancer history, with FNA to assess for recurrence. The type and size of EUS needle does not impact diagnostic yield, but rapid on-site cytopathology and experience improve efficacy.
Lab-on-a-Chip for cancer diagnostics and monitoringstanislas547
This document discusses lab-on-a-chip technology for cancer diagnostics and monitoring. It describes how lab-on-a-chip allows miniaturization of diagnostic tools to fit on a small chip. Examples are given of chips that can detect cancer markers from small samples of blood or other bodily fluids. The document outlines how lab-on-a-chip could provide frequent, non-invasive monitoring of cancer markers to guide treatment and detect recurrence. However, challenges remain in developing control units and integrating all necessary functions like fluid handling and molecular analysis onto a single chip.
01 CellBlockistry- IAC 2019 (May 6-Monday 16- 1500 to 1800)vshidham1
This document discusses cell block preparation techniques. It begins by introducing Vinod Shidham and providing his credentials. It then lists the objectives of discussing cell block preparation methods. Various methods of cell block preparation are described, including using a clot, HistoGel, gelatin embedding, agar embedding, plasma-thrombin, and collodion bag methods. Factors that influence which technique to use are outlined. The importance of cell blocks for diagnostic and research applications is highlighted.
Recent Advances in Pathologic Evaluation of Melanoma Sentinel Lymph Nodes. Sl...vshidham
The document discusses recent advances in the pathologic evaluation of melanoma sentinel lymph nodes. It covers topics such as appropriate immunomarkers for detecting micrometastases, the number of tissue sections that should be examined, and methods for intraoperative evaluation including immunostaining of imprint smears. The 'MCW melanoma cocktail' containing MART-1, Melan-A and tyrosinase allows detection of micrometastases and can be used to rapidly evaluate imprint smears intraoperatively in 17 minutes. Examining additional tissue sections and levels improves diagnostic accuracy for identifying melanoma metastases.
1) Errors during specimen collection account for 70% of all laboratory errors and can compromise patient diagnosis and treatment. Proper collection, handling, and transportation of specimens is crucial for accurate laboratory results.
2) Many factors can affect specimen quality, from patient preparation and phlebotomy technique to tube type and filling. Strict adherence to collection protocols helps ensure specimens are not compromised before analysis.
3) Education and training of phlebotomists is important to prevent errors. Ongoing competency assessments and use of technology like barcode scanners also help ensure specimens are correctly collected and labeled.
This document summarizes the education and research experience of Jaeho Lee. He earned a B.S. in Environmental Horticulture from the University of Seoul and an M.S. in Entomology from Seoul National University. For his graduate thesis, Lee developed a film-assisted honeybee egg collection system to improve honeybee genome editing techniques. He then used these techniques to successfully knockout the nAChR alpha6 gene in honeybees, proving the concept of creating pesticide-resistant honeybees. Lee has also published research on head louse adhesion proteins and acetylcholine esterase paralogs in bedbugs and honeybees.
Detection of Wuchereria bancrofti DNA in paired serum and urine samples using...dewisetiyana52
This study aimed to standardize PCR-based systems for the diagnosis of lymphatic filariasis using serum and urine samples. Paired biological samples were collected from 20 individuals known to be infected with Wuchereria bancrofti. Conventional and semi-nested PCR assays were optimized to detect W. bancrofti DNA. The internal PCR system was able to detect as little as 10 fg of W. bancrofti DNA and detected infection in all 20 patients using both serum and urine samples. In contrast, the semi-nested PCR only detected infection in 2 of the 20 patients. This study demonstrates the potential of using a simple internal PCR system and urine samples for the diagnosis of W. b
This document discusses various methods used in pathologic diagnosis of tumors, including histological examination of biopsy samples, cytological methods like exfoliative cytology and fine needle aspiration cytology, special staining techniques, immunohistochemistry, electron microscopy, tumor markers, and modern techniques like flow cytometry, in situ hybridization, and molecular diagnostic methods. The key information provided is an overview of the major diagnostic tools and techniques used in pathological analysis of tumors.
02 CellBlockistry- IAC 2019 (May 6-Monday 16- 1500 to 1800)vshidham1
Vinod B. Shidham is the executive editor and co-editor-in-chief of CytoJournal. He is a professor and director of cytopathology fellowship training at Wayne State University School of Medicine, Karmanos Cancer Center, and Detroit Medical Center. The document appears to be from a CME on cell block making that discusses techniques for concentrating specimens, embedding cell blocks, immunophenotyping from cell blocks, and case studies.
This document provides an overview of Papanicolaou testing and cervicovaginal smear cytology. It discusses the history and development of the Pap test, including the contributions of Dr. Papanicolaou. It also describes normal cervical cytology findings, abnormalities that may be seen, the Bethesda System for reporting, and advantages of liquid-based cytology over conventional smears. The goal of the document is to provide lectures on Pap testing, cytology methodology, interpretation, and screening.
A comparative study of fine needle aspiration cytology, trucut biopsy and his...iosrjce
IOSR Journal of Dental and Medical Sciences is one of the speciality Journal in Dental Science and Medical Science published by International Organization of Scientific Research (IOSR). The Journal publishes papers of the highest scientific merit and widest possible scope work in all areas related to medical and dental science. The Journal welcome review articles, leading medical and clinical research articles, technical notes, case reports and others.
The document discusses regulatory guidelines for characterization of continuous cell lines used in bioprocessing. It outlines the key definitions, tests, and guidelines recommended by ICH, FDA, and EU for master cell banks, working cell banks, and end-of-production cells. These include testing for sterility, mycoplasma, adventitious agents, karyotyping, and more. The guidelines aim to ensure safety and consistency of cell lines used in biotherapeutic production.
04 Presentations IV VS (8MB)- (3-28-08) .ppsvshidham
Part IV of Four part symposium: “Diagnostic Cytopathology of Serous Effusion” on April 19, 2007 at Neenah, WI, USA
(2008 Wisconsin Society of Cytology, 40th Anniversary)
01 Presentation I VS (8-55MB)- (3-28-08).ppsvshidham
Part I of Four part symposium: “Diagnostic Cytopathology of Serous Effusion” on April 19, 2007 at Neenah, WI, USA
(2008 Wisconsin Society of Cytology, 40th Anniversary)
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Head & neck cancer current perspectives, advances, and challengesSpringer
This document discusses cytopathology of head and neck lesions. It begins by introducing cytopathology as the microscopic study of diseased cells dispersed on glass slides, as opposed to histopathology which examines tissues maintaining cellular architecture. Fine needle aspiration is described as the main cell collection method for head and neck lesions, being minimally invasive and allowing rapid diagnosis. The document focuses on the cytopathology of common lesions in salivary glands, thyroid, and cervical lymph nodes. It provides details on FNA technique and processing, highlights advantages like sensitivity and specificity, and notes limitations such as difficulty distinguishing some salivary gland tumors. Representative cytology images are included to illustrate normal and diseased states.
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Dr. Vinod Shidham is a recognized leader in cytopathology and surgical pathology. He is currently a Professor of Pathology and Vice Chair at Wayne State University School of Medicine. His areas of expertise include cytopathology, surgical pathology, and he has invented and developed novel technologies and methods in these fields. He has extensive publications, serves in leadership roles for professional organizations, and is the editor-in-chief of the open access journal CytoJournal.
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Part II of Four part symposium: “Diagnostic Cytopathology of Serous Effusion” on April 19, 2007 at Neenah, WI, USA
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Overview of FNA procedure- S. K. Navale Medical College, Pune, India
1. Vinod B. Shidham , MD, FRCPath, FIAC Professor Co-editor-in-chief & Executive editor, CytoJournal (www.cytojournal.com) Vice-chair - AP Director of Cytopathology, Residency training program, Cytotechnology School, Cytopathology fellowship, & GI fellowship Dept of Pathology, Wayne State University Medical School Karmanos Cancer Institute & Detroit Medical Center Detroit, MI 48201, USA [email_address] Overview of FNA procedure - Strengths, weaknesses, and training S. K. Navale Medical College, Pune, India Dec 23, 2010
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4. Acknowledgement Shidham & Atkinson Cytopathologic Diagnosis of Serous Fluids Elsevier (W. B. Saunders Company) Some of the sketches and tables used are from the following reference.
5. Introduction FNAB has two important components- Performing the procedure & Interpretation of the aspirated specimen
6. Introduction With following two important considerations Onsite adequacy evaluation- with appropriate triage for appropriate ancillary tests Preferably the performer and interpreter is same to allow benefits of continuity of the process from clinical insight into the lesion to cytomorphologic scrutiny . If the performer and interpreter can not be the same all efforts and resources should be available to achieve continuity amongst the entities involved. Any compromise will lead to suboptimum results in long run.
7. Onsite adequacy evaluation- with appropriate triage For appropriate ancillary tests Preferably the performer and interpreter is same To allow benefits of continuity of the process From clinical insight into the lesion To cytomorphologic scrutiny If the performer and interpreter can not be the same (due to logistics or local conditions)- Resources should be available to achieve the continuity Any compromise risks suboptimum results in long run Introduction (contd) With following two important considerations
8. Performing the procedure is relatively simple if appropriate sequences are followed with strict order with proper application and release of vacuum as needed Although simple, being a skill it demands training and practice Introduction (contd)
34. FNA Biopsy Critical steps 2. Apply vacuum 1. Locate the lesion, insert the needle tip 3. Maintain vacuum & sample different areas of the lesion by inserting back & forth 4. Release the vacuum completely by releasing the syringe piston 5. Remove the needle
60. How? Without risk to the patients Suitable approach to train & practice needed Phantom lesion described is easy to make Training FNAB procedure
61. Video Preparation of Phantom and practicing FNAB procedure Shidham V.B., Varsegi G.M., D’Amore K., Shidham A. (2009). Preparation and Using Phantom Lesions to Practice Fine Needle Aspiration Biopsies. JoVE. 31. doi: 10.3791/1404 Video article is available FREE on web as open access at- http://www.jove.com/index/Details.stp?ID=1404
62. Preparation of Phantom and practicing FNAB procedure 9.26 minutes demo video article FREE on web at- http://www.jove.com/index/Details.stp?ID=1404
63. Certificate of training & practice provided after the training prior to beginning FNAs on patients
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65. Which is also relatively simple if appropriately trained as surgical pathologist with cytopathology training the physician component is the backbone from performing the procedure to final correlation with various clinical components. Ultimate aim is final interpretation of the aspirated specimen
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91. Immunoprofile evaluation- Immunohstochemistry on cell block sections, Flowcytometry On cytospins and other cytology preparations (if required) Molecular studies for- Diagnosis, prognosis, and surveillance Retrieval of cells for other indications- Cell harvesting (tissue banking etc), Cell transplantation (islet cells etc) In addition to morphologic studies:
93. Shidham V.B., Hunt B., Jardeh S.S., Barboi A.C., Devata S., Hari P. (2010). Performing and Processing FNA of Anterior Fat Pad for Amyloid. JoVE. 44 . doi: 10.3791/1747 Video article is available FREE on web as open access at- http://www.jove.com/index/Details.stp?ID=1747
94. Performing FNAB predominantly for cell block FREE on web at- http://www.jove.com/index/Details.stp?ID=1747 9.41 minutes demo video article
95. Processing of FNA aspirate to be submitted to laboratory for Cell block Let the remaining aspirate clot in the syringe for 5 to 7 minutes (slightly longer than the clotting time). 1
96. Processing of FNA aspirate to be submitted to laboratory for Cell block Let the remaining aspirate clot in the syringe for 5 to 7 minutes (slightly longer than the clotting time). 1 Aspirate 10% formalin from the container in which the specimen is to be submitted for cell block processing. This dislodges the clot from syringe wall. 2
97. Processing of FNA aspirate to be submitted to laboratory for Cell block Let the remaining aspirate clot in the syringe for 5 to 7 minutes (slightly longer than the clotting time). 1 Gently and firmly remove the plunger of the syringe . 3 Aspirate 10% formalin from the container in which the specimen is to be submitted for cell block processing. This dislodges the clot from syringe wall. 2
98. Processing of FNA aspirate to be submitted to laboratory for Cell block Let the remaining aspirate clot in the syringe for 5 to 7 minutes (slightly longer than the clotting time). 1 Transfer the aspirated formalin with dislodged cot in to the specimen container with 10% formalin fixative 4 Gently and firmly remove the plunger of the syringe . 3 Aspirate 10% formalin from the container in which the specimen is to be submitted for cell block processing. This dislodges the clot from syringe wall. 2
99. HE stained cell block section Cell-block sections Important for immunocharacterization
101. Proper processing - Including direct smear preparation For PAP and Romanowski stains Proper triage - Based on clinical and on-site cytomorphologic evaluation Cell block (submit directly in 10% formalin ) Flow cytometry (& cytogenetics)- RPMI Microbiology cultures Electron microscopy ( 2.5% glutaraldehyde ) Molecular studies Onsite adequacy evaluation Onsite adequacy evaluation by a trained cytotech, pathologist, or cytopathologist is crucial component of FNA for:
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103. Aspirate triage & processing Direct smears Air-dried Romanowski stain Pap stain (postfixed in 95% ethanol after saline rehydration)
104. Aspirate triage & processing Direct smears Air-dried Romanowski stain Pap stain (postfixed in 95% ethanol after saline rehydration) Wet-fixed in 95% ethanol (for PAP stain ) &/OR
105. Aspirate triage & processing Needle rinse Direct smears Air-dried Romanowski stain Pap stain (postfixed in 95% ethanol after saline rehydration) Pap stain (SurePPath) Pap stain (ThinPrep) OR other LBC fluid (weak fixative) Wet-fixed in 95% ethanol (for PAP stain ) &/OR
106. Aspirate triage & processing Needle rinse Direct smears Air-dried Romanowski stain Pap stain (postfixed in 95% ethanol after saline rehydration) Pap stain (SurePPath) Pap stain (ThinPrep) OR other LBC fluid (weak fixative) Wet-fixed in 95% ethanol (for PAP stain ) &/OR OR Needle rinses in isotonic fluid For Cytspins or smears by other methods from the centrifuged cell buttons
107. Aspirate triage & processing Needle rinse Cell- block Direct smears Air-dried Romanowski stain Pap stain (postfixed in 95% ethanol after saline rehydration) Pap stain (SurePPath) Pap stain (ThinPrep) OR other 10% Formalin PEFF cell-block HE & immuno- stained cell block sections LBC fluid (weak fixative) Wet-fixed in 95% ethanol (for PAP stain ) &/OR OR Needle rinses in isotonic fluid For Cytspins or smears by other methods from the centrifuged cell buttons
109. (contd) For other tests such as Microbiology cultures Molecular tests Aspirate triage & processing Flow cytometry Cytogenetics (RPMI) EM (2.5% glutaraldehyde)
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111. Summary Strength FNAB is well established, minimally invasive, low cost, simple procedure .
112. Weaknesses (Relative limitations) Although simple, being a skill it demands training and practice structured training and practice session is highly recommended for continued efficiency of this very promising and critical modality in patient care in this era with increasing incidence of cancer. Summary (contd)
113. Weaknesses (Relative limitations) Although simple, being a skill it demands training and practice structured training and practice session is highly recommended for continued efficiency of this very promising and critical modality in patient care in this era with increasing incidence of cancer. Precise execution of vacuum application & release is critical. On-site adequacy evaluation and proper triage is highly recommended - To avoid inadequate sampling To minimize chances of sampling artifact To prevent inappropriate processing with suboptimal results Summary (contd)
114. Weaknesses (Relative limitations) Although simple, being a skill it demands training and practice structured training and practice session is highly recommended for continued efficiency of this very promising and critical modality in patient care in this era with increasing incidence of cancer. Precise execution of vacuum application & release is critical. On-site adequacy evaluation and proper triage is highly recommended - To avoid inadequate sampling To minimize chances of sampling artifact To prevent inappropriate processing with suboptimal results Lack of continuity from performing to interpretation. Contamination of non-representative material such as- mucin and mucosal lining in EUS FNAs Sampling artifact due to difficult lesions (accessibility, technical limitations, sclerotic, necrotic etc). Summary (contd)