title: The role of imaging and surgery in the management of vascular tumors of the masseter muscle.
abstract: OBJECTIVE
  Intramuscular vascular malformations are uncommon lesions in the head and neck that may mimic salivary gland disease. This study reports on the use of various imaging modalities and recommends a surgical approach in the management of vascular malformations of the masseter muscle.
  
  
  METHODS
  This is a retrospective study of 7 consecutive patients with vascular tumors of the masseter muscle treated in one unit between 1995 and 2004. The age, gender, signs and symptoms, imaging methods, and surgical outcome are reported. A previously unreported surgical approach is described.
  
  
  RESULTS
  All patients had atypical swellings in and around the parotid region that were difficult to diagnose on plain radiography and computed tomography. Magnetic resonance imaging provides accurate three-dimensional images and provisional diagnosis of lesions within the masseter muscle. Six of the 7 patients underwent surgery by the recommended approach. No patients developed permanent facial weakness following modified parotidectomy. No recurrence of the vascular tumors occurred when the recommended approach is used.
  
  
  CONCLUSIONS
  Magnetic resonance imaging remains the imaging modality of choice for the management of tumors of the masseter muscle. The extended parotidectomy approach gives good and safe surgical access in the management of these uncommon lesions.
authors.affiliation: Maxillofacial Unit, Northampton General Hospital, Northampton, UK. Judith.tonge@ngh.nhs.uk
authors.forename: William Philip
authors.initials: WP
authors.lastname: Smith
authors.forename: Sharon
authors.initials: S
authors.lastname: Prince
authors.forename: S
authors.initials: S
authors.lastname: Phelan
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001165:Arteriovenous Malformations / Q000175:diagnosis* / Q000601:surgery*; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging; D008297:Male; D008406:Masseter Muscle / Q000098:blood supply* / Q000473:pathology / Q000601:surgery*; D008875:Middle Aged; D019647:Oral Surgical Procedures / Q000379:methods*; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed