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Schwannomas are predominantly benign nerve sheath tumors composed of Schwann cells; the tumors can grow anywhere throughout the nervous system that contains Schwann cells.

It has been described that a schwannoma may display variable degenerative changes such as fibrosis, cytological atypia, calcification, hemorrhage, or cystic formations 1).

Intracranial schwannoma.

Spinal schwannoma.

Cystic degenerations occurring in schwannomas are found in schwannomas of the orbital region, olfactory groove, tentorial hiatus, posterior cavernous sinus, presacral region, maxillary sinus, intramedullary spinal region, or intraventicular region 2).

1) , 2)
Borges G, Bonilha L, Proa M Jr, Fernandes YB, Ramina R, Zanardi V, et al. Imaging features and treatment of an intradural lumbar cystic schwannoma. Arq Neuropsiquiatr 2005; 63: 681-684.
schwannoma.txt · Last modified: 2018/02/20 00:04 by administrador