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Primary ovarian carcinoid tumor arising within a mature cystic teratoma in a 32-years-old patient.

Manuel Dominguez Gonzalez, Sofia Vazquez Navarrete, Raquel Jimenez Pena, Maria Carmen Escamez Leon

Mature cystic teratomas (MCT) or dermoid cyst represent 10-20% of all ovarian neoplasm. Primary ovarian carcinoids are rare, accounting for 0,3% of all carcinoid tumors. We report a case of a 32-years-old woman diagnosed with primary carcinoid tumor of the left ovary arising in MCT. Vaginal ultrasonography showed left cystic adnexal image of 60 ? 40 mm, with fine echogenic dotting and a more refringent area in caudal pole. Doppler negative. Negative tumor markers. Pelvic MRI: Pelvic tumor of approximately 50 ? 61 mm of suprauterine location with a thin hypointense capsule with well-defined borders and fat-like signal intensity, which impresses of mature cystic teratoma as the first diagnostic possibility.Laparoscopy and left anexectomy was performed. The histopathological study reports, mature cystic teratoma of 5 cm with a single focus (0.6 cm) of carcinoid tumor. It is difficult to make a diagnosis of primary ovarian carcinoid tumor arising within a mature cystic teratoma of the ovary preoperatively. A thorough histopathological study of the tumor is very important and the surgical treatment adapted according to the characteristics of the patient.