腹腔鏡下手術で摘出した卵巣成熟嚢胞性奇形腫に微小な甲状腺腫性カルチノイドを認めた1例

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An ovarian carcinoid tumor is extremely rare and is classified as a borderline malignant tumor. We report a case of strumal carcinoid tumor arising in a mature cystic teratoma (MCT) of the ovary treated with fertility-preserving laparoscopic surgery. A 21-year-old woman presented with a pelvic mass accompanied by lower abdominal pain. Magnetic resonance imaging revealed tumors in both the right and left ovaries with multi-cystic parts, which were 10 cm and 9 cm in diameter, respectively. Examination of the resected specimens revealed that each cyst cavity was filled with hair, sebaceous material, and cartilage. Histological analysis showed that the left ovarian tumor contained a small focal lesion of strumal carcinoid tumor in a MCT. In conclusion, although an ovarian tumor demonstrates characteristics typical of MCT, it may include small borderline malignant lesions.
日本産科婦人科内視鏡学会の論文