<prompt> Medulloblastoma exclusively occurs in the:MedullaCerebellumCerebral hemispheresSpinal cord  <response>: b. CerebellumRef: Nelsons 20e p 2458, Ghai 8e 612-613Medulloblastoma is a cerebellar tumor occurring predominantly in males and at a median age of 5-7 yr.CT MRI show a solid, homogeneous, contrast enhancing 4th ventricular obstruction hydrocephalus. 