Primary insular carcinoid of the ovary.

Primary ovarian carcinoids are very rare tumors that account for less than 5% of all carcinoids and 0.1% of all ovarian malignancies. We present a rare case of a primary, non-functioning, insular carcinoid of the left ovary in a 44-year-old woman originating from the outer surface of a mature cystic teratoma. After an uneventful unilateral salpingo-oophorectomy, the patient had no sign of recurrence with computed tomography and 5-HIAA evaluation at 3-year follow-up. Although rare, primary ovarian insular carcinoid tumors that are confined to the ovary and treated with surgery are expected to have an excellent overall outcome.