Choroid Plexus tumour - Directly inside fluid spaces of lateral & IV ventricle

Choroid plexus tumors are rare intraventricular neoplasms arising from the epithelium of the choroid plexus, the structure responsible for cerebrospinal fluid (CSF) production. They commonly occur within the lateral ventricles in children and the fourth ventricle in adults. The tumor may cause hydrocephalus and raised intracranial pressure by obstructing CSF pathways and, in some cases, excessive CSF production. Patients may present with headache, vomiting, papilledema, altered consciousness and neurological deficits. They range from choroid plexus papilloma to atypical papilloma and malignant choroid plexus carcinoma.