Study of an ovarian sclerosing stromal tumor presenting as vaginal bleeding in a 7-month-old.

This communication describes the histological, immunohistochemical, ultrastructural, and cytogenetic study of an ovarian sclerosing stromal tumor resected from a 7-month-old girl who presented with vaginal bleeding. The tumor is very rare, its pathogenesis is not clear, and its hormonal activity has been subject to debate. In addition, it has been rarely seen in children and never in infants, with the youngest patient reported being 10 years of age.