Osteochondritis dissecans

• form of AVN, smaller, more focal
• trauma related?
• most commonly at the medial epicondyle of the knee, dome of talus, capitellum
• small fragment can slough off, loose body “joint mouse”

Eponyms

• Kienbock malacia = carpal lunate
• Kohler disease = tarsal navicular
• Freiberg infraction = metatarsal heads
• Legg-Perthes disease = femoral heads
• Scheuermann disease = ring epiphyses of the spine
• Osgood-Schlatter disease = tibial tubercle
• Panner’s disease = capitellum