[Unique tissue differentiation in peripheral nervous system tumors (glandular neurofibroma)].

A rare observation of glandular differentiation in neurofibroma of the right orbit is described. Data on another 7 similar tumors reported in the literature are presented. The problems of histogenesis of such neoplasias and difficulties of their diagnosis are discussed. Glandular neurinomas and neurofibromas are characterized by a malignant course and trend for relapses favouring high lethality in this disease.