by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Multifocal Polypoid Endometriosis Mimicking Malignancy in a Young Woman with a History of Hormonal Treatm

Polypoid endometriosis is a rare type of endometriosis that sometimes mimics the clinical presentation of malignancy. We report a case of a young woman with a history of hormone treat-ment who was suspected to have an ovarian malignancy with metastases. CASE REPORT A 30-year-old G0P0 woman with a history of left ovarian cystectomy due to endometriosis presented with a huge left ad-nexal mass detected on ultrasonography. After the previous cys-tectomy, she was administered a gonadotrophin releasing hor-mne (GnRH) agonist for four months and then a combined oral contraceptive (OC), Mercilon (Organon Ltd., Doublin, Ireland) (mixed ethinylestradiol and desogestrel), for about two years. Her menstrual cycle was regular, but she experienced severe dysmenorrhea. The patient’s serum cancer antigen (CA) 125 level