Two different cases of medulloblastoma with extensive nodularity are illustrated. Two different cases of medulloblastoma with extensive nodularity are illustrated. A, Coronal T1C+ image in a 10-month-old infant shows strong enhancement of grapelike nodules in a huge posterior fossa mass. MBEN was diagnosed at pathology. Case courtesy of B. Jones, MD. B, A child with headaches and papilledema has a grossly nodular enhancing mass in the right cerebellum. Histologic diagnosis was MBEN. A.G. Osborn et al. AJNR Am J Neuroradiol 2012;33:795-802 ©2012 by American Society of Neuroradiology