Pelvic washing cytology of ovarian Sertoli-Leydig-cell tumor with retiform pattern: a case report.

A Sertoli-Leydig-cell tumor is an exceptionally rare neoplasm. We present the pelvic washing cytomorphology of an ovarian Sertoli-Leydig-cell tumor with a retiform pattern in a 24-yr-old female. The cytologic features in this case were tight tissue fragments composed of small, relatively uniform cells with scanty cytoplasm and small rounded or blunt papillary fragments with hyalinized cores lined with small, mildly atypical cuboidal cells. Differential diagnoses included borderline and well-differentiated papillary serous tumors, clear-cell carcinoma, and collagen balls. Correlation of cytologic findings with histomorphology is crucial for correct interpretation of pelvic washings in cases of Sertoli-Leydig-cell tumors.