Medulloblastoma, MRI

Rights Managed

SS2586699

BZ2759

This color-enhanced axial (cross-sectional) T2-weighted MR image shows a large mass arising from the vermis/roof of the fourth ventricle and filling it, severely compressing the brainstem and causing obstructive hydrocephalus in addition to downward herniation of the cerebellar tonsils. This is a medulloblastoma, an aggressive type of primitive neuroectodermal tumor (PNET) which can seed the subarachnoid spaces with metastatic foci. Medulloblastomas are one of the most common posterior fossa tumors of childhood.

Living Art Enterprises/Science Source