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Ovarian teratomas are the ovary's most frequent germ cell tumors and can be either mature or immature. Ovarian teratomas can also have a monodermal form; struma ovarii is the most common type and are usually multilocular cystic lesions with variable locules. Another less common types of monodermal lesion are ovarian carcinoids. Mature cystic teratomas are composed of predominantly fat, while immature teratomas have a larger solid component with only small foci of fat. This review article discusses the various types of ovarian teratomas with their respective imaging findings, gross pathological, histopathological, complications, and clinical management.