Kienbock's Disease (Lunate AVN)

Wrist Bone Dies (Lunate)

Avascular necrosis of the lunate: a carpal bone in the centre of the wrist. Cause often idiopathic but associated with negative ulnar variance (short ulna) and repetitive loading. Most common in males 20-40. Progressive condition: if untreated, leads to lunate collapse and wrist arthritis.

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