Fibrous Histiocytoma in the Knee Joint : Report of 1 Case

ABSTRACT

Benign fibrous histiocytoma (also called giant cell tumor of tendon sheath) is well known but uncommon benign lesion usually occurring in hand and feet of middle age. We present a case of huge fibrous histiocytoma of the knee joint in a 41 years old woman. The patient have a sign of slight extension limitation and a swelling on the lateral side of the knee joint. The oval shape lesion was originating from the anterior joint capsule of the knee and protruding into the femoral intercondylar notch and lateral compartment. The mass was removed through mini-arthrotomy. Histologic study revealed a fibrohistiocytic tumor, composed of spindle cell, giant cell and foamy histiocyte.