Multiple metastases of clear cell sarcoma at diagnosis presented in bone marrow aspirate: A case report.

Clear cell sarcoma (CCS) is a rare and aggressive soft-tissue sarcoma that arises most commonly in adolescents and young adults of both sexes. CCS presents a diagnostic challenge due to its morphological and immunohistochemical similarity to malignant melanoma. We present a rare and severe case of CCS simultaneously with multiple bone and lymph node metastases at the time of initial diagnosis in a previously healthy 15-year-old Chinese man. Detailed information on clinical manifestations, laboratory profiles, histopathological findings and poor outcome were described. The cytomorphology of bone marrow aspirate in CCS in Wright-Giemsa staining smear was first depicted in this case. The diagnostic difficulties of the rare case was also discussed.