Twenty patients with cranial nerves tumors are seen and studied at the San Juan de Dios Hospital National University in Bogota during a period from January 1954 to December 1972. In the same time 612 primary CNS tumors and 103 metastasic were studied in this Center. Amonq the twenty cases, eighteen diagnosis of acoustic neurinoma were made; one case was a right trigeminal neurofibroma and the last one is a 22 year-old man suffering generalized neurofibromatosis including both vagus nerves. The clinical and paraclinical findings are analized making special emphasis in the CSF protein level and neuro-radiologic findings. The histopatholoqic changes are described briefly. A review of the literature is done.