The Calgary Guide to Understanding Disease @TheCalgaryGuide
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Chronic Hypertensive Retinopathy: Pathogenesis and clinical findings

Ophthalmic Artery Hypertension
Stage 1: Mild/vasoconstrictive
 • Acute and chronic vasospasm
Chronic Hypertensive Retinopathy ... -> Cotton-wool Spots ... -> Elschnig's Spots ... #pathophysiology ... signs #symptoms #complications
Diabetic Retinopathy: Pathogenesis and clinical findings

Mild Non-proliferative DR
 • Outpouchings of the weakened capillary walls or
Diabetic Retinopathy ... -> Cotton-wool spots ... retinal ischemia causes ... ophthalmology #diagnosis #complications ... #pathophysiology
Systemic Lupus Erythematosus (SLE): Musculoskeletal Manifestations

 • Immune Complex Deposition
    - Arthralgia, Arthritis
Myopathy (Also caused ... Erythematosus #SLE #MSK ... Musculoskeletal #Complications ... #pathophysiology
Childhood Immunization Schedule: Why we immunize
 • Diphtheria Toxin -> URT inflammation causes pseudomembrane with hardened
URT inflammation causes ... Tetanus Toxin -> Spores ... lymph -> Koplik's spots ... #Immunization #peds ... #pediatrics #pathophysiology
Prader-Willi Syndrome: Pathogenesis and clinical findings
 • Maternal uniparental disomy: inheriting 2 copies of maternal chromosome
Signs/Symptoms/Complications ... fractures • Short ... Syndrome #genetics #pathophysiology ... #peds #pediatrics
Retinopathy of Prematurity: Pathogenesis and clinical findings
Increased metabolic demand of growing eye
-> Excessive VEGF production ->
Retinopathy of Prematurity ... -> Neovascular complications ... detachment #Retinopathy ... #Prematurity #peds ... #pediatrics #pathophysiology
Cauda Equina Syndrome
Causes:
 • Large lumbar degenerative disc herniation (central)
 • Severe lumbar spondylosis
 • Neoplasm
Equina Syndrome Causes ... Signs / Symptoms / Complications ... CaudaEquina #Syndrome #MSK ... #pathophysiology
21-Hydroxylase Deficiency (21-OHD): Pathogenesis and Clinical Findings
Autosomal recessive mutation in CYP21A2 coding for the enzyme 21-OHase
enzyme 21-OHase causes ... Signs/Symptoms/Complications ... #21HydroxylaseDeficiency #21OHD #pathophysiology ... endocrinology #peds
Paget’s Disease: Complications
Abnormal Osteoclasts cause excessive bone turnover -> Incr bone resorption, Incr (abnormal) bone formation

MSK
Paget’s Disease: Complications ... Abnormal Osteoclasts cause ... bone formation MSK ... PagetsDisease #pathophysiology ... signs #symptoms #complications
Bulimia Nervosa: Signs and Symptoms
Associated Psychological / Behavioural Features
 • Feelings of shame, guilt and embarrassment
Symptoms related to complications ... Russell's Sign • Sores ... , scars, calluses ... BulimiaNervosa #pathophysiology