Treatment and follow-up in an asymptomatic malignant struma
ovarii: A case report



Antoni Llueca, Yasmine Maazouzi, Jose Luis Herraiz, Mari Carmen Medina, Dolors Piquer, Blanca Segarra, Raquel Del Moral, Anna Serraa, Guillermo Bassols

Struma ovarii is a rare ovarian tumor, representing 0.5-1% of all ovarian tumors and 2–5% of ovarian teratomas. It is defined as an ovarian teratoma composed mostly of thyroid tissue. The symptoms are nonspecific, and the imaging studies can help in characterize the mass; however, the definitive diagnosis is usually given by the Pathologist. Classically, the treatment is the surgical resection of the ovarian mass, however there is no consensus regarding the follow-up.

Presentation of case:
An asymptomatic malignant struma ovarii in a 43 year-old patient is presented. The diagnosis was postoperatively following a laparoscopic adnexectomy due to an apparently benign ovarian teratoma. The histopathology results revealed a mature ovarian cystic teratoma with papillary carcinoma with immunohistochemical characteristics suggesting a thyroid origin. Seeing that there was no thyroid affectation or metastatic disease, we decided a conservative management. A yearly follow-up with CT scan and tumor markers was performed. The endocrinologist also performed annual controls with thyroid ultrasound and serum tests. The patient has remained asymptomatic during these last four years.

Cátedra Medtronic de Formación e Investigación Quirúrgica

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