Management strategy of primary ovarian mucinous carcinoid tumor: A rare case report.

Rationale: Primary ovarian carcinoid tumors are rare neoplasms, first reported in 1939, with approximately 30 cases reported thus far. It is categorized into insular, trabecular, strumal, and mucinous types. Mucinous forms are extremely rare, comprising < 2% of all primary ovarian carcinoid tumors.

Patient concerns: A 40-year-old gravida 3, para 0 woman visited our clinic with a 3-month history of lower abdominal pain. Ultrasound and abdominal pelvic computed tomography revealed a large, poorly enhancing soft tissue mass in the right adnexa (about 9.4 × 7.0 × 6.8 cm sized). Laparoscopic surgery was performed to a definitive diagnosis, including right salpingo-oophorectomy, left ovarian biopsy, and ascites washing cytology.

Diagnosis: The patient was diagnosed with primary ovarian mucinous carcinoid tumor and received related treatment.

Outcomes: After treatment, the patient symptoms improved, and he was discharged.

Lessons: Approximately 40% of primary ovarian carcinoid tumors with insular morphology present in pure form, and mucinous forms are extremely rare. At present, the main diagnostic methods in cases of primary ovarian mucinous carcinoid tumor include macroscopic examination, histopathology and imaging examination. The main treatment modalities for primary ovarian mucinous carcinoid tumor are surgery. postoperative chemotherapy remains controversial.