Fine needle aspiration cytology of a large cell calcifying Sertoli cell tumor of the testis.

A case of a large cell calcifying Sertoli cell tumor (LCCSCT) of the testis in a 7-year-old boy is presented. Fine needle aspiration (FNA) cytologic smears showed large polygonal tumor cells with abundant finely granular or vacuolated eosinophilic cytoplasm and eccentric nuclei with one distinct nucleolus. A variable amount of amorphous calcification was a constant feature. The light microscopic and ultrastructural features of the tumor cells supported a Sertoli cell origin of the tumor. This tumor is found frequently associated with complex endocrine disorders and usually has a benign course. This case, which appears to be the first such case diagnosed by FNA cytology, shows the efficacy of FNA cytology in the presurgical evaluation of testicular masses.