Struma ovarii. A case report.

Background: Struma ovarii is the presence of thyroid tissue as a major cellular component in an ovarian teratoma.

Case Report: A 46-year-old old woman, with a palpable mass at the anatomical position of the right adnexa known for the preceding 3 years underwent a total abdominal hysterectomy and bilateral salpingo-oophorectomy. Histology reported struma ovarii.

Conclusion: Struma ovarii is a rare tumor of the ovaries and its clinical appearance may vary: it may be asymptomatic, mimic malignant ovarian tumor, or present with symptoms of hyperthyroidism and, in rare cases, it can even be a malignant tumor.