title: [Choroid plexus papilloma in the posterior third ventricle in infancy: a case report].
abstract: Choroid plexus papillomas represent approximately 0.5% of all intracranial tumors, but they are found in the third ventricle only infrequently. We report a case of choroid plexus papilloma in the third ventricle which is difficult to differentiate from a pineal region tumor. A 4-month-old female presented with bulging fontanelle and sunset phenomenon. A CT scan and MRI showed marked hydrocephalus caused by a tumor extending from the posterior third ventricle to the peneal body. Preoperatively, we diagnosed the lesion as a pineoblastoma. The tumor was totally removed through the occipital transtentorial approach. Pathological examination of the tumor revealed a typical choroid plexus papilloma. The operation was uneventful, and she has grown normally without recurrence of the tumor for three years since the operation. A sagittal gadolinium-enhanced MRI was useful in our case to differentiate a choroid plexus papilloma from a pineal region tumor, because the former extended into the aqueduct forming the shape of the letter V while the latter compressed the aqueduct downward.
authors.affiliation: Department of Neurosurgery, Wakayama Medical College, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Tsumoto
authors.forename: E
authors.initials: E
authors.lastname: Nakai
authors.forename: Y
authors.initials: Y
authors.lastname: Uematsu
authors.forename: K
authors.initials: K
authors.lastname: Nakai
authors.forename: T
authors.initials: T
authors.lastname: Itakura
mesh_terms: D002551:Cerebral Ventricle Neoplasms / Q000175:diagnosis* / Q000601:surgery; D003399:Craniotomy / Q000379:methods; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007223:Infant; D008279:Magnetic Resonance Imaging; D020288:Papilloma, Choroid Plexus / Q000175:diagnosis* / Q000601:surgery; D020542:Third Ventricle; D016896:Treatment Outcome