Benign neural sheath neoplasm of the oral cavity

Sublingual hypoglossal neurilemmoma. Case report

“…The lower oral cavity is an unusual site for these neoplasms. 3,7,9 Neurilemmomas of the hypoglossal nerve arise usually from the skull base segment of the nerve, being entirely intracranial or extending extracranially in a dumb-bell shape. 1,10 Neurilemmomas of the most peripheral segment of the XIIth nerve, located in the sublingual space, are rarely encountered.…”

“…Antoni B type tissue is described as reticular, consisting of a loose meshwork of fibrils enclosing cystic spaces. 4,7,9,14 Histologic differential diagnosis of neurilemmoma from the other type of nerve sheath tumour, neurofibroma, is imperative because the latter can undergo malignant degeneration. 7 Radiographic methods can define both the cause and the consequences of XIIth nerve dysfunction.…”

“…4,7,9,14 Histologic differential diagnosis of neurilemmoma from the other type of nerve sheath tumour, neurofibroma, is imperative because the latter can undergo malignant degeneration. 7 Radiographic methods can define both the cause and the consequences of XIIth nerve dysfunction. 12 If a palpable mass is discovered in the sublingual space, both CT and MRI can be used to examine the area.…”

Neurofibroma extra-ósseo solitário do palato duro

“…NFs are immunopositive for the S-100 protein in 85 to 100% of the cases, indicating its neural origin 3,6 . Treatment for solitary NF is surgical excision and recurrence is rare 2,4 . In the case hereby described the tumor was easily removed because it was well outlined.…”

“…However, among neural lesions, this is the one that most frequently affects this region 1,2 . The NF can be intra or extra-osseous, alone or multiple (associated with type I neurofibromatosis) 2,3 . The most common extra-osseous mouth NF locations are tongue, oral mucosa and lips 2 .…”