title: Schwannoma in the lower lip mucosa: unexpected diagnosis.
abstract: Schwannoma is a benign tumor arising from nerve-sheath Schwann cells. When it affects the mouth, the lips are rarely involved. A MEDLINE search in the English literature from 1969 to 2009 revealed only 17 documented cases of schwannomas of the lip. This report describes the unusual case of a 52-year-old man who developed a schwannoma of the lower lip. Histopathologic examination and immunohistochemical staining studies were performed. Although rare, schwannoma should be considered in the differential diagnosis of any nodule or mass in the oral mucosa.
authors.affiliation: Department of Stomatology, Bauru Dental School, University of Sao Paulo, Sao Paulo, Brazil. cardoso_lopes@yahoo.com.br
authors.forename: Camila Lopes
authors.initials: CL
authors.lastname: Cardoso
authors.forename: Elen de Souza
authors.initials: Ede S
authors.lastname: Tolentino
authors.forename: Ana Lucia Alvares
authors.initials: AL
authors.lastname: Capelozza
authors.forename: Alberto
authors.initials: A
authors.lastname: Consolaro
mesh_terms: D018952:Antigens, CD34 / Q000032:analysis; D002467:Cell Nucleus / Q000648:ultrastructure; D003937:Diagnosis, Differential; D006801:Humans; D008048:Lip Neoplasms / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D009061:Mouth Mucosa / Q000473:pathology; D009442:Neurilemmoma / Q000175:diagnosis*; D009418:S100 Proteins / Q000032:analysis
chemical_list: D018952:Antigens, CD34; D009418:S100 Proteins