Mondo Description A rare malignant neoplasm with melanocytic differentiation characterized by the presence of polygonal or spindle shaped clear cells. This sarcoma usually affects the tendons and aponeuroses and is associated with a poor prognosis due to recurrences and metastases.

Disease Ontology Description A sarcoma that is characterized by solid nests and fascicles of tumor cells with clear cytoplasm and prominent nucleoli. It presents as a slow growing mass that especially affects tendons and aponeuroses and it is deeply situated.