The Calgary Guide to Understanding Disease @TheCalgaryGuide
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Stress Fracture: Pathogenesis and clinical findings
Abnormal biomechanics, Repetitive impact activities
=> Repetitive subthreshold mechanical loading
=> Bone strain
=>
Stress Fracture: ... subthreshold mechanical loading ... from continued loading ... StressFractures #msk ... #orthopedics #pathophysiology
Low Ankle Sprain: Pathomechanics and Clinical Findings

Grading Ligament Sprains
l: Minimal ligament disruption, mild swelling & tenderness,
Clinical Findings Grading ... ligament substance leading ... ligament substance leading ... LowAnkleSprain #Sports #MSK ... #orthopedics #Grading
Classification of Pelvic Ring Fractures: Mechanisms, Clinical Features and Complications
 • Anterior Posterior Compression (APC) -
bilateral rami fractures ... Grade 2 - Rami fracture ... posterior ilium fracture ... Classification #Grades #Grading ... #Orthopedics #MSK
Subtrochanteric Femur Fracture: Pathogenesis and clinical findings
 • Subtrochanteric region spans 5 cm distally from the
Subtrochanteric Femur Fracture ... low energy fall fractures ... in elderly Causes ... #msk #orthopedics ... #differential #causes
Femoral Head Fracture: Pathogenesis and clinical findings
 • Posterior hip dislocation -> Impaction force from femoral
Femoral Head Fracture ... • Avulsion or shearing ... • Non-union of fracture ... #msk #diagnosis ... signs #symptoms #orthopedics
Adhesive Capsulitis (Frozen Shoulder) - Pathogenesis and Clinical Findings

 • Primary (Idiopathic): Unknown etiology, but associated
, humeral head fracture ... a stroke that caused ... post-inflammatory healing ... post-inflammatory tissue healing ... stages #staging #msk
Fracture Healing (and disruptors of this process)
Inflammatory Stage (0-7d)
 • Fracture disrupts local blood vessels ->
Fracture Healing ... Fluoroquinolones - Causes ... #Fracture #Healing ... #Stages #Orthopedics ... #msk #Staging #
Paget’s Disease: Complications
Abnormal Osteoclasts cause excessive bone turnover -> Incr bone resorption, Incr (abnormal) bone formation

MSK
Abnormal Osteoclasts cause ... bone formation MSK ... -> Pathologic fractures ... Skull expansion causes ... -> Conductive hearing
Bulimia Nervosa: Signs and Symptoms
Associated Psychological / Behavioural Features
 • Feelings of shame, guilt and embarrassment
/ Behavioural Features ... Secrecy surrounding eating ... Problems and Facial Features ... Sores, scars, calluses ... signs #symptoms #psychiatry