Immature teratoma of the ovary is a rare condition primarily affecting young women and constitutes a significant proportion of ovarian cancer cases in adolescents and young adults. It is commonly diagnosed at stage I, though advanced-stage disease is not infrequent. Accurate diagnosis and a fertility-sparing approach are central to the management of this condition, as many affected women retain, or have yet to develop, a desire for childbearing. However, due to the rarity of this disease, management is often guided by retrospective data derived from subanalyses of studies on malignant ovarian germ cell tumors, which can complicate the treatment of these patients once diagnosed. The aim of this review is to summarize the current evidence on immature teratoma of the ovary, considering it as a distinct clinical and pathological entity.

Immature teratoma of the ovary is a rare condition primarily affecting young women and constitutes a significant proportion of ovarian cancer cases in adolescents and young adults. It is commonly diagnosed at stage I, though advanced-stage disease is not infrequent. Accurate diagnosis and a fertility-sparing approach are central to the management of this condition, as many affected women retain, or have yet to develop, a desire for childbearing. However, due to the rarity of this disease, management is often guided by retrospective data derived from subanalyses of studies on malignant ovarian germ cell tumors, which can complicate the treatment of these patients once diagnosed. The aim of this review is to summarize the current evidence on immature teratoma of the ovary, considering it as a distinct clinical and pathological entity.