Mohamed El-Bakry Lashin¹, Mai Mohammed Abdelwahab², Walid Mohamed Elnagar^1,

Paraovarian cysts are common, accounting for 10–20% of all adnexal lesions, and most of them are benign. On the other side, paraovarian tumors of borderline malignancy are very rare, only about forty cases were reported all over the world. Here, we present a case of 16 years female with left lower abdominal pain, pelvic sonography showed a cystic mass in Douglas pouch with solid mural nodule. She underwent laparoscopy, we detected and extirpated a paraovarian cyst of about 10x10 cm with solid component 3x3 cm and corpus luteum cyst 5x5 cm. After histopathological analysis, it was proved to be borderline ovarian serous tumor Stage Ic according to the International Federation of Gynecology and Obstetrics (FIGO) staging. As till now, there is no clear guideline regarding the management of this tumor; the treatment strategy was determined on the basis of ovarian tumor guidelines, with preservation of fertility. In conclusion, paraovarian cysts is a common disease and usually benign. It rarely causes clinical problems, but caution is necessary as there is a possibility of a malignant or borderline tumor. As in ovarian tumors, even if the size of the solid component of the tumor detected by diagnostic imaging is very tiny, malignant or borderline malignant tumors should be considered.

borderline, ovarian tumor, paraovarian cyst, laparoscopy, imaging