Non Hodgkin's lymphoma. Brain: There is persistent diffuse mild enlargement and enhancement of right trigeminal nerve. There is no evidence of intracranial hemorrhage or acute infarct. There is extensive confluent cerebral white matter T2 hyperintensity. There is a right transfrontal Ommaya catheter that terminates in the right lateral ventricle. The ventricles and basal cisterns are unchanged in size and configuration. There is no midline shift or herniation. There is a small left maxillary sinus retention cyst. Cervical Spine: There is persistent diffuse mild enlargement and enhancement of multiple bilateral lower cervical and upper thoracic nerve roots. Otherwise, there is no evidence of tumor or abnormal enhancement within the cervical spinal canal. The spinal cord displays normal signal and morphology. The vertebral column alignment is within normal limits. The vertebral body and disc space heights are preserved. The vertebral bone marrow signal is unremarkable. There is unchanged mild multilevel degenerative spondylosis, but no significant spinal canal stenosis. The paravertebral soft tissues are unremarkable.
1. Persistent diffuse mild enlargement and enhancement of right trigeminal nerve and multiple bilateral lower cervical and upper thoracic nerve roots, which may represent lymphomatous involvement.2. Extensive cerebral white matter abnormality is likely treatment-related.