Clear Cell Sarcoma of the Knee. A Report of Two Rare Cases

Clear cell sarcoma of soft tissue is a rare type of soft tissue sarcoma. It is derived from melanoblast like cells located within subcutaneous tissue, tendon and aponeuroses. The tumour is also known as malignant melanoma of soft parts because it has similar morphology to malignant melanoma. Unlike malignant melanoma, however, it is not associated with a cutaneous lesion. We report here two cases of this tumour occurring in young adults.