<prompt> Upstream and downstream hydrocephalus is seen inEpendymomaPineal germinomaChoroid plexus papillomaMeningioma  <response>: Most Brain tumors usually produce only upstream hydrocephalus. Choroid plexus papilloma is a CSF producing tumor located in occipital horns of lateral ventricle and produces both upstream and downstream hydrocephalus. CECT axial image showing intensely enhancing lesion in occipital horn of left lateral ventricle so Choroid plexus papilloma. 