History of medulloblastoma, status post treatment: left upper extremity weakness. Brain: There are postoperative findings related to posterior fossa tumor resection and prior transfrontal ventricular shunting. There is extensive encephalomalacia in the cerebellum and scattered punctate foci of susceptibility effect in the cerebellum. However, there is no evidence of enhancing tumor. There is unchanged patchy T2 hyperintensity in the right frontal and occipital periventricular areas. There is a small right superior frontal gyrus developmental venous anomaly. There are punctate foci of susceptibility effect in the left amygdala and left parietal lobe white matter. There is no evidence of acute infarct. The ventricles are diffusely prominent, but unchanged. There is no midline shift or herniation. The major cerebral flow voids are intact. There is fatty marrow in the skull base related to radiation therapy. There are bilateral lens implants. There are persistent secretions within the left maxillary sinus. Cervical Spine: There is fatty marrow within the vertebral bone marrow related to radiation therapy. There is no evidence of tumor in the cervical spine. The vertebral column alignment is within normal limits. The vertebral body and disc space heights are preserved. There is no significant spinal canal stenosis. The spinal cord displays normal signal and morphology.
Post-treatment findings related to fourth ventricular medulloblastoma resection and irradiation without evidence of recurrent tumor or drop metastases in the cervical spine. 