A<unk>  (literally: goitre of the ovary) is a rare form of monodermal teratoma that contains mostly thyroid tissue, which may cause hyperthyroidism. Despite its name,<unk>  is not restricted to the ovary. The vast majority of<unk>  are benign tumours; however, malignant tumours of this type are found in a small percentage of cases.
Struma ovarii
Postpartum thyroiditis
Ovarian apoplexy
Salpingitis isthmica nodosa
Follicular cyst of ovary
Thyrotoxicosis factitia
Prolactinoma
Young's syndrome