title: Malignant struma ovarii.
abstract: Malignant struma ovarii is a very rare tumor, belonging to the group of germ cell tumors. The diagnosis is difficult and there is no agreement in the literature concerning the necessary histologic features for malignancy. A case report is presented and the problems of diagnosing are discussed.
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology; D000368:Aged; D005260:Female; D006801:Humans; D010051:Ovarian Neoplasms / Q000175:diagnosis* / Q000473:pathology; D011379:Prognosis; D013330:Struma Ovarii / Q000175:diagnosis* / Q000473:pathology; D013964:Thyroid Neoplasms / Q000473:pathology