[Pseudo-tumoral neurological affections in adults localized to the middle and posterior sections of base of skull (author's transl)].

Many neurological affections of the middle and posterior sections of base of skull may simulate tumors. Vascular disorders include diabetic lesions, diffuse cerebral vascularitis, vascular malformations, posterior fossa angioma, telangiectasis or cavernous hemangioma, and basilar artery aneurysms. Degenerative or deficiency nervous system affections may also simulate tumors, as well as bone or nerve malformations, such as erosions due to basilar artery compression. Arnold-Chiaris malformation, aqueduct stenosis, or an empty sella turcica.