A case report of malignant struma ovarii.

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A 43-year-old woman presented with an intraperitoneally disseminated malignant struma ovarii of the left ovary, diagnosed by histopathology. Preoperative thyroid function tests showed no evidence of abnormalities. Significant past medical history included right struma ovarii 11 years previously, for which the patient had undergone left salpingo-oophorectomy.<BR>Microscopic examination showed that the large cysts and follicles of varying size were lined by low cubic epithelium, and contained colloid. The follicles resembled those of normal thyroid tissue. The immunoperoxidase staining for thyroglobulin was positive for disease both in the tumor cells lining the follicles and in the colloid. We conclude that in case of struma ovarii, long-term follow-up is necessary.
近畿産科婦人科学会の論文