Schwannomas are relatively common in neurosurgical practice, accounting for approximately 25% of all primary spinal tumors. The vast majority of spinal schwannomas are small, well-circumscribed, intradural, extradural or combined intradural-extradural lesions. Lumbosacral schwannomas may attain significant size before the development of painful symptoms or neurologic deficit, owing to slow growth of the tumor, mobility of the nerve roots, and wide capacity of the spinal canal. There are more than 20 reported cases of giant schwannomas involving the cauda equina - most of them intrasacral.
展开▼
