Struma ovarii | |
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Micrograph of a struma ovarii. Characteristic thyroid follicles are seen on the right, and ovarian stroma on the left. H&E stain. | |
Specialty | Oncology |
A struma ovarii (literally: goitre of the ovary) is a rare form of monodermal teratoma that contains mostly thyroid tissue, which may cause hyperthyroidism.[1]
Despite its name, struma ovarii is not restricted to the ovary.
The vast majority of struma ovarii are benign tumours; however, malignant tumours of this type are found in a small percentage of cases.[2]