The Calgary Guide to Understanding Disease @TheCalgaryGuide
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Type I Hypersensitivity: Pathogenesis and clinical findings
Definition: Production of lgE Antibodies that bind to harmless allergens
leading to an allergic ... Sensitization" to Allergen ... Initial exposure to allergen ... cells recruited Complications ... #Immunology #pathophysiology
Type III Hypersensitivity: Pathogenesis and clinical findings
Definition: Small antigen-antibody complexes (produced from normal immune response to
: • Systemic Lupus ... HypersensitivityReaction #Allergy ... #Immunology #pathophysiology
Systemic Lupus Erythematosus (SLE): Musculoskeletal Manifestations

 • Immune Complex Deposition
    - Arthralgia, Arthritis
Systemic Lupus Erythematosus ... Erythematosus #SLE #MSK ... Musculoskeletal #Complications ... #pathophysiology ... signs #symptoms #diagnosis
Systemic Lupus Erythematosus: Gastrointestinal Manifestations
 - Thrombosis of vessels in the pancreas, Vasculitis -> Acute Pancreatitis
Systemic Lupus Erythematosus ... #Systemic #Lupus ... Gastrointestinal #Complications ... #pathophysiology ... signs #symptoms #diagnosis
Anaphylaxis: Signs and Symptoms
Anaphylaxis: when any egg of three conditions is met:
1. Acute onset of skin/mucosal
exposure to a likely allergen ... exposure to known allergen ... Signs / Symptoms / Complications ... #Anaphylaxis #pathophysiology ... #immunology #diagnosis
Lupus (SLE): Mucocutaneous Manifestations

 • Langerhan cells and keratinocytes release cytokines -> localized inflammatory response ->
Lupus (SLE): Mucocutaneous ... Subacute cutaneous lupus ... Manifestations #pathophysiology ... #diagnosis #signs ... #symptoms #complications
Femoral Head Fracture: Pathogenesis and clinical findings
 • Posterior hip dislocation -> Impaction force from femoral
Signs/Symptoms/Complications ... FemoralHead #Fractures #msk ... #diagnosis #pathophysiology
Retinoblastoma: Pathogenesis and clinical findings
 • Sporadic mutation -> One allele of RB1 tumor suppressor gene
Signs / Symptoms / Complications ... Retinoblastoma #pathophysiology ... #ophthalmology ... #diagnosis #signs
Achilles Tendon Rupture - Pathogenesis and clinical findings
 • The Achilles tendon is 15cm long in
Signs/Symptoms/Complications ... TendonRupture #diagnosis ... signs #symptoms #pathophysiology ... #msk #orthopedics
Cauda Equina Syndrome
Causes:
 • Large lumbar degenerative disc herniation (central)
 • Severe lumbar spondylosis
 • Neoplasm
Signs / Symptoms / Complications ... CaudaEquina #Syndrome #MSK ... #pathophysiology ... #diagnosis #symptoms