Extraovarian Fibroma with Minor Sex Cord Elements—a Rare Tumour at Rare Site

Sex cord stromal tumour (SCST) of ovary account for 5–8% of all ovarian malignancies. These include fibroma, thecoma, fibro-thecoma, Leydig cell tumour, granulosa cell tumour, and Sertoli cell tumour. Although considered primary ovarian malignancy, SCST has been described in extraovarian location also. Extraovarian SCST is a rare occurrence, and so far, only 25 cases have been reported in literature and only one amongst them was extraovarian fibroma with minor sex cord element. Considering the rarity, diagnosis and proper treatment remain the real challenge in these tumours. To the best of our knowledge, this is the second case of extraovarian fibroma with minor sex cord element to be reported. Herein, we report a case of 41-year-old lady who presented with large abdomino-pelvic mass which was considered ovarian tumour; however, intraoperatively both ovaries and uterus were found to be normal, and the mass was actually arising from sigmoid mesocolon.