Imaging features of intraventricular melanoma.
We present the MR imaging findings in a patient with symptoms of increased intracranial pressure and a mass in the left lateral ventricle. The mass showed increased signal intensity on T1-weighted images and low signal intensity on T2-weighted images. The histologic diagnosis was that of melanoma, and detailed physical and funduscopic examinations disclosed no evidence of a primary lesion. We believe that the mass was a primary intraventricular melanoma, possibly arising from the choroid plexus, and we discuss the mechanisms that may be responsible for its occurrence in this location.
D001932:Brain Neoplasms / Q000175:diagnosis* / Q000473:pathology; D002552:Cerebral Ventricles / Q000473:pathology*; D016545:Choroid Plexus Neoplasms / Q000473:pathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D019586:Intracranial Hypertension / Q000175:diagnosis; D008279:Magnetic Resonance Imaging / Q000379:methods; D008545:Melanoma / Q000175:diagnosis* / Q000473:pathology; D008875:Middle Aged; D009887:Ophthalmoscopy