8 results
Interphalangeal Joint Dislocation
Interphalangeal joint dislocations almost always occur dorsally, look for associated avulsion fractures! Here's a
PIP joints are ... and PIP joints ... of the extensor tendons ... Radiology #XRay #Diagnosis ... #Orthopedics #MSK
Mallet Finger
Absence of a fracture does NOT exclude Mallet finger, the extension function of the DIP
terminal extensor tendon ... Exam: Swollen and tender ... DIP joint that ... Radiology #XRay #Diagnosis ... #Orthopedics #MSK
Achilles Tendon Rupture - Pathogenesis and clinical findings
 • The Achilles tendon is 15cm long in
Achilles Tendon ... gastrocnemius (+ Thompson ... calf squeeze test ... TendonRupture #diagnosis ... pathophysiology #msk
Approach to Joint Pain - Diagnostic Framework

1) Chronicity
2) Inflammatory vs Non-Inflammatory
3) Number of Joints Involved

1) Chronicity:
Pain - Diagnostic ... warm, swollen, tender ... - parvovirus, HIV ... #Joint #Pain #MSK ... #differential #diagnosis
Distinguishing between Inflammatory and Degenerative joint disease
Inflammatory Joint Disease
 • Swelling stimulates joint nociceptors -> Pain
nociceptors -> Pain with rest ... tend to bear the ... affects the knee hip ... Comparison #Versus #MSK ... JointDisease #JointPain #Diagnosis
Approach to Joint Pain

History:
Is the pain from:
	• Joint
	• Adjacent bursa
	• Tendon
	• Ligament
	• Bone
	• Muscle
	• Referred from
Adjacent bursa • Tendon ... present both at rest ... e.g., congenital hip ... #Pain #MSK #rheumatology ... #differential #diagnosis
Bone Deformity / Limp - Differential Diagnosis Algorithm 
Infection
 • Septic Arthritis
 • Cortical Hypertrophy
 •
- Differential Diagnosis ... JointHip Dysplasia ... Disease Knee Joint ... Patella (e.g., Tendon ... Deformity #Limp #MSK
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
- Differential Diagnosis ... vesicular eruption - Joints ... diminished, or tender ... retinopathy Lab Tests ... Cryoglobulins • HIV