Mixed Trabecular and Mucinous Carcinoid Arising in the Background of a Mature Ovarian Cystic Teratoma.

Ovarian carcinoid tumors, originating from mature ovarian cystic teratomas (dermoid cysts), are rare neuroendocrine tumors. The synchronous occurrence of trabecular and mucinous carcinoid tumors within a single ovarian teratoma is infrequent and has limited documentation. We present the case of a 67-year-old postmenopausal woman presenting with abdominal pain, constipation, and urinary retention, but without features of carcinoid syndrome. Ultrasonography identified a complex, multiloculated cystic mass in the right ovary. Laboratory assessments, including CA-125 levels, were unremarkable. The cyst was aspirated and surgically excised, with the patient experiencing an uncomplicated recovery. Histopathological and immunohistochemical analyses confirmed a mixed trabecular and mucinous carcinoid tumor within the teratoma. A six-month follow-up ultrasound revealed no recurrence, and the patient remained symptom-free. This case highlights the importance of considering synchronous, asymptomatic carcinoid tumors in mature ovarian teratomas during gross and histopathological examinations. Additionally, the presence of a mucinous carcinoid should warrant a high suspicion of metastasis and subsequent recurrence. Further research is needed to establish management and recurrence monitoring guidelines.