König's disease in the first metatarsophalangeal joint

Abstract

Splitting osteochondritis (König's disease) mainly affects the knee joint, much less frequently the elbow, ankle and in extremely rare cases the shoulder and hip joints. The disease is manifested by aseptic necrosis and rejection of the bone tissue in the area adjacent to the articular cartilage, with the surface facing the joint remaining smooth and covered by cartilage, and the surface of the margin being roughened. Occasionally, the detached area will fall out into the joint cavity, which can give the clinical picture of a blockage of the affected joint.

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