INTRAARTICULAR EPITHELIOID SARCOMA

A case of an intraarticular epithelioid sarcoma is presented. The pati ent was a 35 year old man who presented with a 10 months history of a chronic monoarthritis. The MRI showed a diffuse lesion involving the s ynovial membrane of the knee. There was a marked increased signal on T 2 weighted images. Most epithelioid sarcomas involve the subcutaneous tissues of the hands or feet. This presentation is unusual and this en tity should be considered in the differential diagnosis of an intraart icular proliferative process.