Apophysitis of tibial tubercle in adolescents due to repetitive traction from quadriceps. Common in athletic boys (10–15 yrs). Clinical: pain, swellin...
Congenital variant where meniscus is thickened and disk-shaped. Most common in lateral meniscus (incidence 1–3%). Clinical: snapping, pain, locking in...
Focal subchondral bone necrosis leading to cartilage instability. Common site: lateral aspect of medial femoral condyle. Clinical: pain, swelling, cat...
Cartilage defects cause pain, swelling, mechanical symptoms; poor intrinsic healing. ACI: two-stage procedure — harvest cartilage → culture chondrocyt...
Avulsion of flexor digitorum profundus (FDP) tendon from distal phalanx. Mechanism: forced extension of DIP during active flexion (grabbing opponent’s...
Flexion of PIP joint with hyperextension of DIP joint. Caused by central slip rupture of extensor tendon at PIP. Mechanism: forceful blow, RA, lacerat...
Hyperextension of PIP with flexion of DIP joint. Caused by RA (most common), trauma, chronic mallet finger, spasticity. Clinical: finger looks like sw...
Fibroproliferative disorder of palmar fascia causing fixed flexion deformity of fingers. Risk factors: male, >40 years, northern European descent, dia...
Injury to ulnar collateral ligament (UCL) of thumb MCP joint. Mechanism: valgus stress from fall on abducted thumb (ski pole). Clinical: pain, swellin...
Menisci are fibrocartilaginous structures aiding load transmission, stability, and lubrication. Types: longitudinal, horizontal, radial, flap, bucket...