Choroid plexus papilloma of 4th ventricle and hydrocephalus. Evaluation for drop metastases is requested. There are partially imaged postoperative findings in the posterior fossa and an enhancing mass in the fourth ventricle with associated dilatation of the superior portion of the fourth ventricle. However, there is no evidence of intraspinal mass or abnormal enhancement. The spinal cord displays normal signal and morphology. The vertebral column alignment is within normal limits. The vertebral body heights are preserved. The vertebral bone marrow signal is unremarkable. There is loss of disc space height and an associated disc bulge at L5-S1 without significant spinal canal stenosis.
1. No evidence of drop metastases in the spinal canal.2. Partially imaged fourth ventricular choroid plexus tumor associated with obstructive hydrocephalus.