@entity808 in the head and neck: retrospective analysis of 21 XXXX and review of the literature.

@entity808 @entity1 @entity5 @entity3292 @entity1264 @entity4786
CONTEXT AND OBJECTIVE: @entity808 are benign neoplasms of the peripheral nerves originating in the Schwann cells. According to their cellularity, they can be subdivided into Antoni A or Antoni B types. They are rare and usually solitary, with clearly delimited capsules. They occur in the head and neck region in only 25% of the cases, and may be associated with @entity1264 . The present study retrospectively analyzed some data on this disease in the head and neck region and reviewed the literature on the subject. DESIGN AND SETTING: Retrospective study at Head and Neck Service, Universidade Estadual de Campinas. METHODS: Data on 21 @entity1 between 1980 and 2003 were reviewed. The sites of cervical @entity808 and the intraoperative, histopathological and postoperative clinical status of these cases were studied. Diagnostic methods, type of surgery and association with @entity4786 were evaluated. RESULTS: The @entity1 ' ages ranged from 16 to 72 years. Four @entity1 had a positive past history of @entity1264 or @entity1264 . The nerves affected included the brachial and cervical plexuses, vagus nerve, sympathetic chain and lingual or recurrent laryngeal nerve. The nerve of origin was not identified in six cases. @entity5 enucleation was performed in 16 @entity1 ; the other five required more extensive surgery. CONCLUSION: @entity808 and @entity3292 both derive from Schwann cells, but are different entities. They are solitary lesions, except in @entity1264 . They are generally benign, and rarely recur. The recommended surgical treatment is @entity5 enucleation.
