Sertoli-Leydig cell tumor with heterologous element: a case report and a review of the literature.

The patient was a 19-year-old female who presented with a chief complaint of progressive pelvic pain. Preoperative ultrasound of the right ovary revealed an ovarian torsion as the cause of the patient's progressive pain. Laparoscopy confirmed the torsion and revealed a right ovary measuring 10 cm in greatest diameter. Intraoperative incision into the ovary revealed a simple ovarian cystic mass measuring 3.0 x 1.5 x 0.8 cm. A solid component within the cyst was identified. Histological sections of the cystic mass demonstrated mononuclear and hyperchromatic Sertoli cells with a trabecular growth pattern. Clusters of medium-sized epithelioid cells with abundant eosinophilic cytoplasm consistent with Leydig cells were also identified between the trabeculae of Sertoli cells. In addition, focal areas of intestinal type mucinous epithelium were identified embedded within the trabeculae of Sertoli cells. Immunohistochemical studies revealed that the Sertoli cells were positive for calretinin (bright) while the Leydig cells were positive for calretinin (dim), inhibin, CAM5.2 and AE1&3. CEA showed positivity mainly of the intraluminal contents of the mucinous type intestinal epithelium. The patient had an uneventful post-operative course and was disease-free for 3 years.