TY - JOUR T1 - Imaging Features of Intraventricular Melanoma JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. SP - 691 LP - 693 VL - 20 IS - 4 AU - Andres Arbelaez AU - Mauricio Castillo AU - Diane M. Armao Y1 - 1999/04/01 UR - http://www.ajnr.org/content/20/4/691.abstract N2 - Summary: 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. ER -