title: Leydig cell tumor with gynecomastia. Report of a case with electron microscopy.
abstract: A case of Leydig cell tumor is reported and discussed. The tumor, 1.5 cm in diameter, was located in the capsule of the right testis. Gynecomastia present for 3 months was almost absent 4 months postoperatively. Preoperative hormone analysis revealed a low concentration of serum testosterone, which was normalized 1 week postoperatively. In electron microscopic examination, several intracytoplasmic microbody-like structures and 'tigroid' mitochondria were noted. These findings are similar to the three earlier descriptions of Leydig cell tumors.
mesh_terms: D000328:Adult; D006177:Gynecomastia / Q000209:etiology* / Q000473:pathology; D006801:Humans; D007984:Leydig Cell Tumor / Q000150:complications / Q000648:ultrastructure*; D008297:Male; D008854:Microscopy, Electron; D013736:Testicular Neoplasms / Q000150:complications / Q000648:ultrastructure*; D013739:Testosterone / Q000097:blood
chemical_list: D013739:Testosterone