Ovarian torsion (OT) is one of the most common gynecological emergencies and can affect women of all ages [1]. Ovarian torsion has a bimodal age distribution, with a tendency to occur in young women (15-30 years old) and postmenopausal women. Moreover, the risk of OT increases in postmenopausal women with ovarian masses [2]. The mechanism of torsion of ovaries is unclear. Ovarian tumors, ovarian cysts and ovulation induction, which expands the ovarian volume, can be regarded as predisposing factors for OT [3]. As the size of the mass increases, the risk of torsion increases, until the mass becomes large enough to be fixed in place in the pelvis. In addition, masses that are fixed in place due to adhesions (e.g. endometrioma, tubo-ovarian abscess) or malignancy appear to be less likely to torse. It should be noted that OT rarely occurs in normal adnexa [4].A 83-year-old postmenopausal woman presented with sudden onset of lower abdominal pain and discomfort. Her obstetric and gynecological history were unremarkable, without history of tubal sterilization. Hypertension and heart failure were recorded. On physical examination, she was afebrile but hypertensive. A tense mass in the right adnexa was identified in her vaginal examination and clinical examination of the abdomen revealed abdominal rebound and defense. Ultrasound revealed a well-defined, echo-free cystic mass 8 cm × 10 cm in size on the right side of her uterus with a partial septations (Figure 1). No abnormal findings were demonstrated involving her left adnexa, and her uterus was normal. There was no ascites in the pouch of Douglas. Stroma was heterogeneous in appearance and locally hypoechoic and hyperechoic areas were noted in Doppler USG. Ovarian artery and venous blood were detected and the vascular signal was not completely lost. Her blood count and erythrocyte sedimentation rate were normal. Serum markers of ovarian malignancy were obtained and found to be within normal limits. After approximately 6 h, the patient was taken to the laparotomy for a possible malignancy. The pre-operative diagnosis was torsion of malignant right ovarian cystic mass. An urgent laparotomy was performed which revealed a dark-red, round-shaped ruptured cystic lesion that twisted at the right infundibulo-pelvic ligament site in the right adnexa area. Her uterus and left ovary were normal and there were signs of necrosis on her right ovary and fallopian tube after reduction of the torsion (Figure 2). A right salpingo-oophorectomy was performed and it was sent for a histopathological examination. Frozen inspection was done. No pathologic