Delayed rupture of stomach after blunt abdominal trauma.

thumbs. She had a history of "double-jointed" thumb, and had pain, tenderness, and abnormal laxity of her first carpometacarpal joints. The other joints were clinically normal, and there was no evidence of generalised hypermobility. Radiography showed chondrocalcinosis and osteoarthritis of the carpometacarpal joints, and aspiration confirmed the presence of pyrophosphate crystals. Metabolic screening for diseases associated with chrondrocalcinosis yielded negative results. Case 4-A 52-year-old man presented after a self-limiting attack of acute synovitis of his right knee. At the age of 23 he had undergone right medial meniscectomy for a meniscus tear, and on examination there was laxity of the collateral ligaments. Radiographs showed osteoarthritic changes in the right knee and linear calcification in the lateral meniscus; the other joints were normal. There was no family history of arthritis, and no metabolic abnormality was found.