[Angioma of the Gasserian ganglion. Morphological and histogenetic considerations on a case].

A cavernous haemangioma of the Gasserian ganglion in a 37-year-old man is presented. It is the third reported case of cavernoma in this region, where infrequently tumors develop. Carotid angiogram shows a network of neoformed vessels in the middle cranial fossa. The hypotheses about the malformative origin of this tumor and the differential diagnosis toward other highly vascularized meningeal tumors are discussed.