Fourth-ventricular immature teratoma.

Teratomas account for 3% of all childhood tumors. This group of non-germinomatous germ cell tumors exhibit cellular and structural characteristics associated with the three germ layers. The immature cells can differentiate into more malignant neoplasms. We report the presentation and management of a 4-year-old girl with an immature teratoma of the fourth ventricle. The outcome of this intracranial immature teratoma was poor, due to the patient's age, the extensive lesion at presentation and the grade of the tumor. Copyright Â