8-year-old female with medulloblastoma resection and treatment, 3 months off therapy. Brain:Redemonstrated are postoperative findings related to suboccipital craniotomy for resection of a cerebellar medulloblastoma. There is unchanged mild confluent T2 hyperintensity in the medial cerebellar hemispheres along the margins of the resection site. Also redemonstrated is an unchanged the punctate focus of enhancement at the inferior aspect of the fourth ventricle which may be vascular related. There are no new abnormal enhancing foci.There is no evidence of acute intracranial hemorrhage, or infarct. The ventricles and basal cisterns are stable in size and configuration. Redemonstrated is susceptibility along a previous left parietal region ventriculostomy tract. There is no midline shift or herniation. The skull and extracranial soft tissues are unchanged. Expected vascular flow voids are demonstrated. The visualized paranasal sinuses and mastoid air cells are clear.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, most compatible with radiation effects, unchanged in appearance. 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.