Malignant Struma ovarii: Report of a Case and Review of the Literature

Malignant struma ovarii is a very rare disease and therefore there is neither common agreement on treatment regimens nor sufficient follow-up experience. The case of a 38-year-old woman with malignant struma ovarii is described. The patient presented with a clinically silent ovarian neoplasm discovered incidentally during investigations for metrorrhagia. The ovarian mass was resected and the tumor was found to be a teratoma. Within the teratoma a papillary thyroid carcinoma of the follicular variant was found. Subsequently, in order to make follow-up of the patient possible by thyroglobulin measurement and radioiodine whole body scintigraphy, near-total thyroidectomy was performed and the thyroid was found to be normal on histology. Whole body radioiodine scintigraphy with 131I and ablation of the thyroid remnant by the administration of 80 mCi 131I was performed. The patient recovered uneventfully and is now well.