Medulloblastoma status post craniotomy, chemotherapy, and radiation therapy: off therapy evaluation. Brain: There are postoperative findings related to suboccipital craniotomy for resection of a cerebellar medulloblastoma. There is unchanged confluent T2 hyperintensity in the medial cerebellar hemispheres along the margins of the resection cavity, but no gross evidence of tumor. There are also unchanged scattered punctate foci of susceptibility effect in the cerebral hemispheres and along a right occipital surgical tract. There is no evidence of acute intracranial hemorrhage or infarct. The ventricles and basal cisterns are unchanged in size and configuration. There is no midline shift or herniation. The skull appears unchanged. The paranasal sinus inflammatory changes have resolved.Spine: The spinal cord and cauda equina nerve roots display normal signal characteristics. There is no evidence of abnormal enhancement within the spinal canal. The vertebral bone marrow displays diffuse T1 and T2 hyperintensity, compatible with fatty marrow conversions related to radiation effects. The vertebral column alignment is within normal limits. The vertebral body heights are preserved. The paraspinal soft tissues are unremarkable.
1. No convincing evidence of tumor recurrence in the posterior fossa. 2. No evidence of drop metastases in the spinal canal.