title: Benign masseter muscle hypertrophy.
abstract: Idiopathic hypertrophy of the masseter muscle is a rare disorder of unknown cause. Some authors associate it with the habit of chewing gum, temporo-mandibular joint disorder, congenital and functional hypertrophies, and emotional disorders (stress and nervousness). Most patients complain of the cosmetic change caused by facial asymmetry, also called square face, however, symptoms such as trismus, protrusion and bruxism may also occur. The goals of the present investigation were: to report a case of idiopathic masseter hypertrophy, describe its symptoms and treatment. The patient reported bilateral bulging in the region of the mandible angle, of slow and progressive evolution. He did not complain of pain or discomfort, however there was bilateral otalgia, nighttime trismus and stress. In his physical exam we noticed bilateral masseter hypertrophy without local inflammatory alterations. We indicated surgical treatment with an extraoral approach. Complementary tests are indicated when there is diagnostic doubts. Treatment varies from conservative to surgical, and the later depends on surgeon skill and experience.
authors.affiliation: Head of the ENT and Head and Face Surgery Department at Hospital Angelina Caron.
authors.forename: Daniel Zeni
authors.initials: DZ
authors.lastname: Rispoli
authors.affiliation: Head of the Larynx and Ear Ward of the ENT and Head and Face Surgery Department at HAC.
authors.forename: Paulo M
authors.initials: PM
authors.lastname: Camargo
authors.affiliation: Head of the Otoneurology and Tinnitus Ward of the ENT and Head and Face Surgery Department at HAC.
authors.forename: José L
authors.initials: JL
authors.lastname: Pires
authors.affiliation: Supervisor of the Pediatric ENT Ward at HAC. Electronic address: vrfonseca@ig.com.br.
authors.forename: Vinicius R
authors.initials: VR
authors.lastname: Fonseca
authors.affiliation: Student at the ENT and Head and Face Surgery Department at HAC.
authors.forename: Karina K
authors.initials: KK
authors.lastname: Mandelli
authors.affiliation: Student at the ENT and Head and Face Surgery Department at HAC. This paper was produced by the ENT and Head and Face Surgery Department at Hospital Angelina Caron.
authors.forename: Marcela A C
authors.initials: MAC
authors.lastname: Pereira
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D006984:Hypertrophy / Q000473:pathology; D008297:Male; D008406:Masseter Muscle / Q000473:pathology*; D012468:Salivary Gland Neoplasms / Q000175:diagnosis; D013705:Temporomandibular Joint Disorders / Q000175:diagnosis / Q000473:pathology*; D055815:Young Adult