Clear cell sarcoma with melanin: report of two cases.

Two cases of clear cell sarcoma, one with many melanin pigmented cells and the other scanty, are described. Both are associated with tendons of the lower extremities of young Chinese adults. Their clinical behaviour differed vastly; one patient was dead seven months after local excision and block dissection of regional lymph nodes, while the other had a history of the growth of eight years prior to local excision and is well four years later.