. The American journal of roentgenology, radium therapy and nuclear medicine . resents himselfwith a knee filled with osteocartilaginousloose bodies. On palpation the knee feelslike a sac filled with marbles. The roentgeno-grams show the bodies, perhaps fifteen,twenty, thirty or more, but the joint surfaceslook smooth. This condition is called osteo-chondromatosis (Fig. 3). The bodies areformed by the somewhat thickened synovialmembrane, hanging in folds and teats oftissue, the latter at first fibrous, later becom- femur which on exploration was pronouncedchondroma. The tumor recurred; it then


. The American journal of roentgenology, radium therapy and nuclear medicine . resents himselfwith a knee filled with osteocartilaginousloose bodies. On palpation the knee feelslike a sac filled with marbles. The roentgeno-grams show the bodies, perhaps fifteen,twenty, thirty or more, but the joint surfaceslook smooth. This condition is called osteo-chondromatosis (Fig. 3). The bodies areformed by the somewhat thickened synovialmembrane, hanging in folds and teats oftissue, the latter at first fibrous, later becom- femur which on exploration was pronouncedchondroma. The tumor recurred; it thenproved to be more cellular and was pro-nounced chondrosarcoma. Amputation wasdone but the patient died in less than a yearwith multiple metastasis in the lungs. Wemight well consider osteochondromatosis tobe a benign neoplasm. The elbow is not infrequently the site ofloose bodies. Usually a history of traumasustained many years before may be symptoms are milder than when thebodies occur in the lower extremities. Invari-ablv there is loss of extension with occa-. \^* i\^


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