Secondary malignant synovitis: report of three cases and review of the literature.

Metastatic malignant deposits in joints are rare and only 16 cases have been described. The details of three further cases are presented, a girl with Hodgkin's lymphoma in a sternoclavicular joint, an elderly lady with carcinoma of the ascending colon and knee metastases and a middle-aged man, also with knee deposits, from an adenocarcinoma of lung. The clinical features together with details of synovial fluid cytology of all 19 cases are analysed.