Choroid plexus papilloma
Increased head circumference
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A lobulated hyperdense soft tissue mass with a "cauliflower-like" appearance in the trigone of the left lateral ventricle with intense contrast enhancement. The ventricular system is enlarged.
CT features of a choroid plexus papilloma.
Usually the ventricular system is dilated as a result of an increased production of CSF ("overproduction hydrocephalus").