Long survival with metastatic clear cell sarcoma of the Achilles tendon.

Clear cell sarcoma of tendons and aponeuroses is a rare tumor with a predilection for the lower extremities, particularly the foot. Although it is claimed to have a poor prognostic outlook, it is sometimes characterized by a slow clinical course. The authors report a case with a prolonged survival period of 7 years--5 years in the presence of multiple lung metastases.