The Calgary Guide to Understanding Disease @TheCalgaryGuide
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Type III Hypersensitivity: Pathogenesis and clinical findings
Definition: Small antigen-antibody complexes (produced from normal immune response to
self-antigens are the cause ... Erythematosus (SLE ... antigens are the cause ... HypersensitivityReaction #Allergy #Immunology
Systemic Lupus Erythematosus (SLE): Musculoskeletal Manifestations

 • Immune Complex Deposition
    - Arthralgia, Arthritis
Erythematosus (SLE ... Myopathy (Also caused ... Erythematosus #SLE ... #MSK #Musculoskeletal ... signs #symptoms #diagnosis
Systemic Lupus Erythematosus: Gastrointestinal Manifestations
 - Thrombosis of vessels in the pancreas, Vasculitis -> Acute Pancreatitis
the pancreas, Vasculitis ... Erythematosus #SLE ... signs #symptoms #diagnosis
Lupus (SLE): Mucocutaneous Manifestations

 • Langerhan cells and keratinocytes release cytokines -> localized inflammatory response ->
Lupus (SLE): Mucocutaneous ... hair follicles -> causes ... Livedo Reticularis, Vasculitis ... Phenomenon #Lupus #SLE ... pathophysiology #diagnosis
IgA Vasculitis – Henoch Scholein Purpura: Pathogenesis and Clinical Findings

 - Infectious Agents - 50% have
IgA Vasculitis – ... Leukocytoclastic vasculitis ... periumbilical region), nausea ... #HSP #IgA #Vasculitis ... Pathophysiology #Diagnosis
Polyarteritis Nodosa (PAN): Pathogenesis and Clinical Findings

Medical Comorbidities Malignancies (most commonly hairy-cell leukemia)
Immunogenetic Predisposition: patient is
Viral replication causes ... Pathophysiology #Diagnosis ... Signs #Symptoms #Vasculitis
Subtrochanteric Femur Fracture: Pathogenesis and clinical findings
 • Subtrochanteric region spans 5 cm distally from the
fractures in elderly Causes ... Femur #Fractures #msk ... #orthopedics #diagnosis ... #differential #causes
Cauda Equina Syndrome
Causes:
 • Large lumbar degenerative disc herniation (central)
 • Severe lumbar spondylosis
 • Neoplasm
Equina Syndrome Causes ... CaudaEquina #Syndrome #MSK ... pathophysiology #diagnosis
Classification of Pelvic Ring Fractures: Mechanisms, Clinical Features and Complications
 • Anterior Posterior Compression (APC) -
Anterior Sl diastasis ... , posterior Sl ligaments ... posterior through Sl ... #Orthopedics #MSK ... #diagnosis #complications
X-Linked Agammaglobulinemia: Pathogenesis and clinical findings
The epidemiology of this disease is 1/340,000 births and roughly double
40% of patients diagnosed ... to produce all classes ... pathophysiology #immunology