ABSTRACT
Schwannomas and neurofibromas are benign tumors of the peripheral nerve sheath (PNST). Few population-based incidence estimates are available. About 7.9% of primary central nervous system tumors originate from cranial or spinal nerves accounting for 2500 cases per year, but this number does not include tumors arising beyond the intradural nerve root (1). The incidence of schwannomas and neurofibromas is increased in patients with neurofibromatosis type I and II.
