Epithelioid sarcoma: ultrastructural observation of lymphoid cell-induced lysis of tumor cells.

Epithelioid sarcoma of the palm of 7 months' duration was observed in a 30-year-old man. Six months after wide surgical excision there was no evidence of recurrence or metastasis. By light microscopic examination the tumor showed typical nodular arrangement of malignant cells, with necrosis of these cells in the centers of the nodules.