Fine needle aspiration cytology of clear cell sarcoma. Report of a case with immunocytochemical, immunohistochemical and ultrastructural studies.

Cytologic finding of clear cell sarcoma obtained by fine needle aspiration (FNA) of a tumor are described. The tumor probably originated in the retroperitoneal tissue, and the diagnosis was confirmed histologically by open biopsy. Percutaneous needle aspirates of the intraabdominal tumor and touch preparations obtained from the open biopsy specimen revealed numerous atypical cells with an extremely hyperchromatic nucleus, prominent nucleoti and clear cytoplasm