ICD-11 definition : A struma ovarii (literally: goitre of the ovary) is a rare form of monodermal teratoma
that contains mostly thyroid tissue, which may cause hyperthyroidism. Despite its
name, struma ovarii is not restricted to the ovary. The vast majority of struma ovarii
are benign tumors; however, malignant tumors of this type is found in a small percentage
of cases.;
A struma ovarii (literally: goitre of the ovary) is a rare form of monodermal teratoma
that contains mostly thyroid tissue, which may cause hyperthyroidism. Despite its
name, struma ovarii is not restricted to the ovary. The vast majority of struma ovarii
are benign tumors; however, malignant tumors of this type is found in a small percentage
of cases.