The Calgary Guide to Understanding Disease @TheCalgaryGuide
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Account created for The Calgary Guide to Understanding Disease - Linking pathophysiology to clinical presentation - http://calgaryguide.ucalgary.ca/
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Stress Fracture: Pathogenesis and clinical findings
Abnormal biomechanics, Repetitive impact activities
=> Repetitive subthreshold mechanical loading
=> Bone strain
=>
Stress Fracture: ... => Microscopic fractures ... => Fracture propagation ... loading Stress Fracture ... StressFractures #msk
Classification of Pelvic Ring Fractures: Mechanisms, Clinical Features and Complications
 • Anterior Posterior Compression (APC) -
of Pelvic Ring Fractures ... bilateral rami fractures ... Grade 2 - Rami fracture ... posterior ilium fracture ... #Orthopedics #MSK
Open Fractures: Mechanisms, Clinical Features and Complications
Gustilo-Anderson Classification:
 • Type I
   - Wound <
Open Fractures: ... Mechanisms, Clinical Features ... Classification #Open #Fractures ... Complications #MSK
Subtrochanteric Femur Fracture: Pathogenesis and clinical findings
 • Subtrochanteric region spans 5 cm distally from the
Subtrochanteric Femur Fracture ... low energy fall fractures ... Atypical femur fracture ... Subtrochanteric #Femur #Fractures ... #msk #orthopedics
Femoral Head Fracture: Pathogenesis and clinical findings
 • Posterior hip dislocation -> Impaction force from femoral
Femoral Head Fracture ... • Non-union of fracture ... #FemoralHead #Fractures ... #msk #diagnosis
Representative X-ray appearance of a primary benign bone tumor - Aneurysmal Bone Cyst 
 • Soft
appearance of a primary benign ... #ShoulderXRay #Radiology ... Clinical #Labeled #Benign
Spondylolysis & Spondylolisthesis: Pathogenesis and Clinical Findings

Pars interarticularis stress fracture (spondylolysis) - most frequently in the
interarticularis stress fracture ... Spondylolisthesis #MSK
Osteoarthritis (OA): X-ray features 
 - Joint space narrowing (least specific)
 - Subchondral Cysts (pockets of
Osteoarthritis (OA): X-ray features ... Osteoarthritis #OA #Xray #radiology
Rheumatoid arthritis (RA): X-ray features
 • Soft tissue swelling (best seen by comparing left & right
arthritis (RA): X-ray features ... HandXray #Diagnosis #Radiology
Benign Primary Bone Tumors: Pathogenesis of X-ray appearance
 • "Geographic" bone destruction
 • Lack of soft-tissue
Benign Primary Bone ... periosteum) #Benign ... XRay #diagnosis #Radiology ... #Features