Orbitotemporal neurofibromatosis: case report.

Plexiform neurofibromas occur in about 60% of neurofibromatosis type 1(NF-1) patients and can lead to severe morbidity by disfigurement or compression of vital structures. Moreover, these tumors can undergo malignant transformation. Both focal and localized bone abnormalities are part of the phenotypic expression of NF-1.

Primary spinal epidural lymphomas.

An epidural location for lymphoma is observed in 0.1-6.5% of all the lymphomas.