School ager with 3 days of abdominal distension

Gross pathology image of ovarian endodermal sinus tumor
Surgical image shows a tumor arising from the right ovary being delivered from the peritoneal cavity without spillage of tumor. A portion of the omentum (right superior aspect of image) was adherent to the tumor. The patient had a right salpingo-oophorectomy with partial omentectomy.

The diagnosis was ovarian endodermal sinus tumor.