A 43-year old women was admitted to our hospital for investigation and
treatment of a right ovarial tumour. Presenting symptoms and signs in
cluded recurrent pelvic pain since half a year, nervousness and interc
urrent 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 r
are neoplasia of teratomatous nature.