Large-cell calcifying Sertoli cell tumor of the testis: a case report with ultrastructural study.

Large-cell calcifying Sertoli cell tumor (LCCSCT) is a rare histologic variant of Sertoli cell tumor. Recently we observed a case of LCCSCT of the testis with no associated endocrine abnormality. Our ultrastructural findings of rows of tight junctions, numerous intracytoplasmic filaments, and abundant rough endoplasmic reticulum in whorled formations support the Sertoli cell origin of this neoplasm.