[Struma ovarii--a case report].

A 43-year old women was admitted to our hospital for investigation and treatment of a right ovarian tumour. Presenting symptoms and signs included recurrent pelvic pain since half a year, nervousness and intercurrent insomnia. At operation a solid cystic tumour was found arising from the right ovary. Histologically a combination tumour was found to consist of a multilocular cystadenoma and a true struma ovarii as a rare neoplasia of teratomatous nature.