Sclerosing stromal tumor of the ovary. A hormonal, histochemical and ultrastructural study.

Three new cases of sclerosing stromal tumor of the ovary have been studied by hormonal, immunohistochemical and electron microscopic analysis. The results confirm that this tumor may have hormonal activity. Ultrastructural study shows findings different from those previously reported. The authors propose an origin from the ovarian stroma with luteinization of stromal tumor cells.