Genetic disorders of bone can be inherited, caused by spontaneous mutations, or result from exposure to toxins. They involve alterations in the transcription or processing of skeletal structural molecules or defects in signaling pathways. Common types include achondroplasia (the most common form of dwarfism), hypochondroplasia, spondyloepiphyseal dysplasia, multiple epiphyseal dysplasia, cleidocranial dysplasia, osteogenesis imperfecta, and osteopetrosis. Evaluation involves assessing clinical features, family history, and radiographs. Prenatal diagnosis is now popular using ultrasound to detect skeletal abnormalities in the second trimester. Management focuses on treating complications orthoped
Skeletal dysplasia musculoskeletal radiology is very concise and it cover the all-important topic of skeletal dysplasia with their characteristic feature and radiological findings with a proper radiographic image. Starting from classification and approach. It includes nosology classification. Thanks.
Skeletal dysplasia musculoskeletal radiology is very concise and it cover the all-important topic of skeletal dysplasia with their characteristic feature and radiological findings with a proper radiographic image. Starting from classification and approach. It includes nosology classification. Thanks.
Different types and categoroes of compressive myelopathy have been explained.
Their clinical findings, investgating features and radiological features have been discussed.
Different types and categoroes of compressive myelopathy have been explained.
Their clinical findings, investgating features and radiological features have been discussed.
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New Directions in Targeted Therapeutic Approaches for Older Adults With Mantl...i3 Health
i3 Health is pleased to make the speaker slides from this activity available for use as a non-accredited self-study or teaching resource.
This slide deck presented by Dr. Kami Maddocks, Professor-Clinical in the Division of Hematology and
Associate Division Director for Ambulatory Operations
The Ohio State University Comprehensive Cancer Center, will provide insight into new directions in targeted therapeutic approaches for older adults with mantle cell lymphoma.
STATEMENT OF NEED
Mantle cell lymphoma (MCL) is a rare, aggressive B-cell non-Hodgkin lymphoma (NHL) accounting for 5% to 7% of all lymphomas. Its prognosis ranges from indolent disease that does not require treatment for years to very aggressive disease, which is associated with poor survival (Silkenstedt et al, 2021). Typically, MCL is diagnosed at advanced stage and in older patients who cannot tolerate intensive therapy (NCCN, 2022). Although recent advances have slightly increased remission rates, recurrence and relapse remain very common, leading to a median overall survival between 3 and 6 years (LLS, 2021). Though there are several effective options, progress is still needed towards establishing an accepted frontline approach for MCL (Castellino et al, 2022). Treatment selection and management of MCL are complicated by the heterogeneity of prognosis, advanced age and comorbidities of patients, and lack of an established standard approach for treatment, making it vital that clinicians be familiar with the latest research and advances in this area. In this activity chaired by Michael Wang, MD, Professor in the Department of Lymphoma & Myeloma at MD Anderson Cancer Center, expert faculty will discuss prognostic factors informing treatment, the promising results of recent trials in new therapeutic approaches, and the implications of treatment resistance in therapeutic selection for MCL.
Target Audience
Hematology/oncology fellows, attending faculty, and other health care professionals involved in the treatment of patients with mantle cell lymphoma (MCL).
Learning Objectives
1.) Identify clinical and biological prognostic factors that can guide treatment decision making for older adults with MCL
2.) Evaluate emerging data on targeted therapeutic approaches for treatment-naive and relapsed/refractory MCL and their applicability to older adults
3.) Assess mechanisms of resistance to targeted therapies for MCL and their implications for treatment selection
These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
micro teaching on communication m.sc nursing.pdfAnurag Sharma
Microteaching is a unique model of practice teaching. It is a viable instrument for the. desired change in the teaching behavior or the behavior potential which, in specified types of real. classroom situations, tends to facilitate the achievement of specified types of objectives.
Anti ulcer drugs and their Advance pharmacology ||
Anti-ulcer drugs are medications used to prevent and treat ulcers in the stomach and upper part of the small intestine (duodenal ulcers). These ulcers are often caused by an imbalance between stomach acid and the mucosal lining, which protects the stomach lining.
||Scope: Overview of various classes of anti-ulcer drugs, their mechanisms of action, indications, side effects, and clinical considerations.
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
Dr Sujoy Dasgupta presented the study on "Couples presenting to the infertility clinic- Do they really have infertility? – The unexplored stories of non-consummation" in the 13th Congress of the Asia Pacific Initiative on Reproduction (ASPIRE 2024) at Manila on 24 May, 2024.
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
(DSM-5) integrates alcohol abuse and alcohol dependence into a single
disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
In the DSM-5, all types of substance abuse and dependence have been
combined into a single substance use disorder (SUD) on a continuum
from mild to severe. A diagnosis of AUD requires that at least two of
the 11 DSM-5 behaviors be present within a 12-month period (mild
AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
drinking, negative social consequences, risky use, and altered physiological
effects (tolerance, withdrawal). This chapter presents an overview
of the prevalence and harmful consequences of AUD in the U.S.,
the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
pharmacotherapies for AUD.
Flu Vaccine Alert in Bangalore Karnatakaaddon Scans
As flu season approaches, health officials in Bangalore, Karnataka, are urging residents to get their flu vaccinations. The seasonal flu, while common, can lead to severe health complications, particularly for vulnerable populations such as young children, the elderly, and those with underlying health conditions.
Dr. Vidisha Kumari, a leading epidemiologist in Bangalore, emphasizes the importance of getting vaccinated. "The flu vaccine is our best defense against the influenza virus. It not only protects individuals but also helps prevent the spread of the virus in our communities," he says.
This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
To encourage widespread vaccination, the government is also collaborating with local schools, workplaces, and community centers to facilitate vaccination drives. Special attention is being given to ensuring that the vaccine is accessible to all, including marginalized communities who may have limited access to healthcare.
Residents are reminded that the flu vaccine is safe and effective. Common side effects are mild and may include soreness at the injection site, mild fever, or muscle aches. These side effects are generally short-lived and far less severe than the flu itself.
Healthcare providers are also stressing the importance of continuing COVID-19 precautions. Wearing masks, practicing good hand hygiene, and maintaining social distancing are still crucial, especially in crowded places.
Protect yourself and your loved ones by getting vaccinated. Together, we can help keep Bangalore healthy and safe this flu season. For more information on vaccination centers and schedules, residents can visit the Karnataka Health Department’s official website or follow their social media pages.
Stay informed, stay safe, and get your flu shot today!
These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
The hemodynamic and autonomic determinants of elevated blood pressure in obes...
genetic disorders of bone.pptx
1.
2. Genetic disorders of bone
Brig.Naveed Hussain Syed
HOD Surgery Department
CMH Bahawalpur
3. Pathogenesis
• Usually categorised into 3
……> ½ of cases
– Genetically Inherited
• Dorminant / Recessive / X-linked
– Spontaneous Mutations
– Secondary to exposure to toxic substances or
infectious agents resulting in disruption of normal
skeletal dvt
• Mechanisms
– Alteration in transcription of or intra or Extracelluar
processing of structural molecules of skeleton
– Defects in receptor/ Signal transduction pathways of
skeletal differentiation + Proliferation
6. Prenatal Diagnosis
• Currently popular, usually 2nd Trimester
• U/s Shows shortening of skeleton
– Femur length used………..Most Common
– Other – Skull, Spine
• Additional testing can be done by Chorionic Villous Sampling +
Mutation Analysis
• Problems
– Skeletal Dysplasias Rare (Similar xtics but diff. molecularly)
– Some not apparent during 2nd trimester (only evident in 3rd or after birth)
– U/s is a limited tool (Sensitivity 40-60%, experience)
8. • Commonest form of Dwarfism…….approx 1.5 : 10000 live births
• Genetics
– Autosomal Dorminant. 80-90% due to spontaneous mutation
– Risk increases with increasing paternal age (>36 yrs)
– Mutations in the gene for FGFR3. (gly for arg)
– FGFR overexpression also inhibits PTHrP causing abnormal apoptosis of chondrocytes
– The common mutations cause a gain of function of the FGFR3 gene, resulting in :
↓ Endochondral ossification.
↓ Proliferation of chondrocytes in growth plate cartilage.
↓ Cellular hypertrophy.
↓ Cartilage matrix production.
Achondroplasia
9. • Short Stature………Seen at Birth
– Truncal Height Normal, Arm Span + Standing height reduced
– Rhizomelic Micromelia
– Fingertips reach Greater Trochs (normal – Mid thigh)
– Height approx 4 ft 3” males, 4ft 1” females
• Arms & Legs
– Trident Hand – Inability to approx extended middle + ring finger
– Star fish Hand – All digits of equal length
– Radial Head subluxations………..may lead to elbow contractures
– Bowed Legs (Genu varum)………Occasionally
– Relative shortening of tibia compared to fibula
– Coxa Breva like appearance due to shortening of femoral neck
• Face
– Enlarged Head with frontal bossing and mandibular protrusion
– Mid face hypoplasia ( Dental crowding / Otitis Media / Flat nose bridge / Obst. Apnea)
Clinical Features - Achondroplasia
11. Orthopedic Considerations
• Most related to spine
• Craniocervical Stenosis
– Commonest cause of mortality. Sympts include:
• Hypotonia
• Sleep Apnea
– Central – compression of upper cervical spinal cord
– Obstructive – upper airway obst. due to midface hypoplasia
• Hydrocephalus
– Rare in achondroplasia, communicating type
• Thoracolumbar kyphosis
– Usually seen in almost all children at thoracolumbar jxn
– As child learns to walk, muscle tone + trunk control improves =
resolution
12. Management of Achondroplasia
• Usually centered around mx of complications
• Spinal Kyphosis
– Non Op… Bracing
– Op………..Ant. Corpectomy + posterior fusion (Kyp >60 by 5yrs)
• Lumbar Stenosis
– Non Op….Wt Loss, Physical therapy, Corticosteroid injections
– Op…………Laminectomy + fusion
• Foramen Magnum Stenosis
– Urgent Decompression
• Genu Valgum
– Tibial osteotomies + Hemiepiphysiodesis
• Controversial
– Growth Hormone therapy + Surgical lengthening of Limbs
13. Hypochondroplasia
• Less severe form of dwarfism
• Autosomal Dorminant, 50% chance of passing to
offspring
• Mutation – FGFR3 but difference in affected a.a
(tyrosine)
• Mild forms usually undetected at birth
• Foramen Magnum stenosis + thoracolumbar stenosis
rare
14. Hypochondroplasia
• Ht discrepancy less than achondroplasia
• Less pronounced facial xtics
• Mesomelic limbs
• <10% associated with Mental Retardation (unlike
Achondroplasia)
• Rx
– Surgery rare
– Growth Hormone can have +ve impact……controversial
15. Spondyloepiphyseal Dysplasia
• Mutation – COL2A1
• 2 types
– SED Congenita – Autosomal dorminant – severe
– SED Tarda – X-linked, Milder form
• Usually affects vertebrae and epiphysis
16. Orthopedic Manifestations
• Short
• Short
• Barre
• Angu
• Lum
– D
– G
• Wadd
• Club
stature
neck, widespread eyes
l Shaped chest
lar deformities esp Genu Valgum
bar lordosis
ue to hip flexion contractures
ive abdomen a protrusional app
ling gait – coxa vara
foot
ciated conditions
• Asso
– Cleft Palate
– Retinal detachment
– Nephrotic syndrome - Tarda
- Cataracts
- Deafness
17. SED
• Rx
– Atlantoaxial instability a concern
• Early occipitocervical spondylodesis
– Coxa Vara
• Valgus corrective osteotomy if angle <100 or is
progressive
– Scoliosis
• Manage operatively if angle>40
18. Multiple Epiphyseal Dysplasia (MED)
– Dwarfism xtised by delayed + irreg ossification at
multiple epiphysis
– Genetic
• Defect – COMP (Cartilage Oligomeric Matrix Protein) gene
• Mutation – COL9A1/A2/A3
– Ass. With Type 2 collagenopathy since type 9 acts as link points for
type 2
• Autosomal dorminant
• Autosomal recessive – rare (Early OA/Clubfoot/multiple layered
patella/brachydactyly)
Issue – Failure of formation of secondary ossification centre
Femoral + humeral j
k
j
j
hep
adi
g
sch
ou
mh
monlyaffected.
19. Dr.Virinderpal Singh Chauhan
• Types
– Fairbank
– Ribbing – milder form
• Clinically
– Short limbed dwarf
– Joint pains – often don’t manifest until 5-14 yrs
– Waddling gait
– Flexion contractures of knee/elbow
– SPINE + PELVIS - NORMAL
20. Mx of MED
• Ortho rx rarely necessary in children
• Osteotomies to correct angular deformities
esp around knee
• Degenerative Arthritis – symptomatic rx
– ?Early THR
21. Cleidocranial Dysplasia
• Affects bones of membranous origin
• Defect – RUNX2/ CFBA1 gene (Chr 6)
– Codes for osteoblastic specific transc. Factor req for osteoblastic
differentiation
• Features
– Short Stature
– Skull bossing (front
– Maxillary region u
• Maxillary microgn
– Clavicles partially o
• Cause shoulders t
• Shoulders can be
al/parietal/occipital)
nderdvt
athia, exophthalmos
r completely absent (10%)
o drop & neck to appear large
approximated
Absent Clavicles
Dr.Virinderpal Singh Chauhan
22. Cleidocranial Dysplasia
• Pelvis narrow, hips may be unstable at birth
• Coxa Vara + Trendelenburg Gait
• Increased incidence of scoliosis
Ortho implications
• No Rx for clavicles
• Scapulothoracic arthrodesis for symptomatic
shoulder dysfunction
• Coxa vara Rx with valgus rotation
23. Osteogenesis Imperfecta
• A.k.a Fragilitus Ossium / Brittle Bone Dx
• Pathogenesis
– Impaired mutation Type 1 collagen
– Mutation – COL1A1 & COL1A2 genes
– Impaired cross links preventing production of
polymerized collagen
– Fracture Healing not impaired with large amounts of
callus formation
24. Clinical Manifestations
• Bone fragility and fractures
fractures heal in normal fashion initially
but the bone is does not remodel
can lead to progressive bowing
• Ligamentous laxity
• Short stature
• Scoliosis
• Codfish vertebrae (compressionfx)
• Olecranon apophyseal avulsion fx
26. Clinical Diagnosis
• Symptoms
– Mild Cases – multiple #s during childhood
– Severe - #s at birth. Maybe fatal
• Signs
– Sabre Shin Appearance
– Bowing of bones
– Scoliosis
27. Classification of OI
• Type 1
– Mildest
– Presents at Pre-school age
– Autosomal Dorminant
– Blue Sclera
– Hearing deficit in 50%
– Avulsion #s common due to decreased tensile
strength of bone
• Type 2
– Autosomal Recessive
– Lethal in perinatal period
– Blue Sclera
28. Classification of OI
• Type 3
– Autosomal recessive
– Normal Sclera
– #s at birth
– Progressive short statu
– MOST Severe survivab
re
le form
• Type 4
– Moderately severe
– Autosomal Dorminant
– Bowing of bones + Vertebrae #s common
– Normal Hearing
– White Sclera
Type 5,6,7 added to original
classification.
No real mutation but Abnormal
bone on microscopy
5 – Hypertorphic Callus after #
29. Management
• Fracture
– Prevention
• Early Bracing
Decrease # Incidence
• Bisphosphonates
– Suppress activity of osteoclasts hence px bone mass loss &
resorption
– Role of cyclic IV Palmidronate….drug holiday/efficacy??
– Issues
» Jaw necrosis
» Atypical Subtroch & femoral stress #s
» Radiographic Changes consistent with Osteopetrosis
Decrease Deformities
Stabilize Lax Joints
30. Management
• Fracture Treatment
– Non op if < 2ys
– Op
• Pt > 2ys
– Telescopic rods
• Sofield Miller Procedures
– Correctional for Severe deformities
– “Sausage” procedure
– Scoliosis
• Observe if <45 degrees
• Bracing ineffective
• Operative – posterior fusion
31. Osteopetrosis
• Osteopetrosis is a group of rare hereditary skeletal
disorders characterized by a marked increase in bone
density
• it is due to defect in remodeling caused by failure of
normal osteoclast function.
• Defective osteoclastic bone resorption , combined with
continued bone formation and endochondral
ossification, results in thickening of cortical bone and
sclerosis of the cancellous bone.
32. • However, their increased size does not improve their
strength. Instead, their disordered architecture, results
in weak and brittle bones that results in multiple
fractures with poor healing.
• There are two separate sub types of
osteopetrosis:
▫ Infantile autosomal recessive osteopetrosis
▫ Benign adult autosomal dominant osteopetrosis
33. Autosomal recessive
osteopetrosis
• Infantile autosomal recessive osteopetrosis is the more
severe form that tends to present earlier.
• Hence, it is referred to as "infantile" and "malignant“,
compared to the autosomal dominant osteopetrosis.
• By age 6, 70% of the affected will die.
• Most of the remainder have a very poor quality of life
with death resulting by the age of ≈ 10.
34. Clinical Features:
Those who survive childbirth present with :
• Cranial nerve entrapment
• Snuffling (nasal sinus architecture abnormalities)
• Hypercalcaemia
• Pancytopaenia (anaemia, leukopaenia and
thrombocytopaenia)
• Hepatosplenomegaly (extramedullary haemopoesis)
• intracerebral haemorrhage (thrombocytopaenia)
• Lymphadenopathy
• One of the commonest presentations is with ocular
disturbance: failure to establish fixation, nystagmus or
strabismus. The cause of these symptoms is compression
of the cranial nerve roots because of foraminal
overgrowth.
35. Autosomal dominant osteopetrosis :
• The autosomal dominant type is less severe than
its autosomal recessive mate.
• Hence, it is also given the name "benign" or
"adult" since patients survive into adulthood.
Clinical Features:
• 50% patients are asymptomatic
• Recurrent fractures
• Mild anemia
• Rarely cranial nerve palsy
36. Radiology
Radiographical Features:
• Bones are uniformly sclerotic.
• Bones appear club like
• Bone within bone (Endo bone) appearance is also seen.
• Vertebrae are extreamly radiodense and they show
alternating bands- rugger- jersey sign.
37.
38. Treatment and Prognosis:
• Bone marrow transplantation is the only hope for
permanent cure.
• Interferon gamma-l b, often in combination with
calcitriol, has been shown to reduce bone mass, decrease
the prevalence of infections, and lower the frequency of
nerve compression.
• Administration of corticosteroids (to increase circulating
red blood cells and platelets), para thormone,
macrophage colony stimulating factor, and
erythropoietin.
• Limiting calcium intake also has been suggested.
• Additional therapy consists of supportive measures.such
as transfusions and antibiotics for the complications.