PT - JOURNAL ARTICLE AU - Andres Arbelaez AU - Mauricio Castillo AU - Diane M. Armao TI - Imaging Features of Intraventricular Melanoma DP - 1999 Apr 01 TA - American Journal of Neuroradiology PG - 691--693 VI - 20 IP - 4 4099 - http://www.ajnr.org/content/20/4/691.short 4100 - http://www.ajnr.org/content/20/4/691.full SO - Am. J. Neuroradiol.1999 Apr 01; 20 AB - 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.