Amyloidoma of the gasserian ganglion

We report an unusual case of an amyloidoma of the gasserian ganglion associ ated with trigeminal neuralgia, MR imaging showed a mass in Meckel's cave, which was isointense with surrounding tissue on T1-weighted images and hypo intense on T2-weighted images. After contrast administration, the mass enha nced homogeneously, and thin cuts through the region showed involvement in the expected location of the gasserian ganglion and, more laterally and inf eriorly, in the proximal part of V-1. A review of the literature revealed t hat only one similar case has been reported since the advent of modern neur oimaging, Amyloidoma, although rare, may be considered as a rare differenti al diagnosis of a mass in this region.