title: Imaging findings of some buccomasseteric masses.
abstract: OBJECTIVE
  The purpose of this study was to review and illustrate the appearances on diagnostic images of pathologic conditions of the buccomasseteric region.
  
  
  METHODS
  Computed tomographic, sonographic, and magnetic resonance images of the buccomasseteric masses were reviewed retrospectively.
  
  
  RESULTS
  In our series of 66 cases, there were 60 benign lesions; of these, 21 were benign masses, 11 were inflammations, and 28 were myopathies. The most common pathologic condition of the buccomasseteric region was masseteric hypertrophy (n = 22). The most common lesion manifesting as a benign mass in this series was hemangioma (n = 10), which was followed by lipoma (n = 6). Six of the 66 patients had malignant tumors.
  
  
  CONCLUSIONS
  Computed tomography and magnetic resonance imaging were useful in demonstrating the location and extent of the buccomasseteric masses. Sonography provided clear images of internal architectures of the mass in this region.
authors.affiliation: Department of Radiology, Nagasaki University School of Dentistry, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Yonetsu
authors.forename: E
authors.initials: E
authors.lastname: Nakayama
authors.forename: K
authors.initials: K
authors.lastname: Yuasa
authors.forename: S
authors.initials: S
authors.lastname: Kanda
authors.forename: S
authors.initials: S
authors.lastname: Ozeki
authors.forename: M
authors.initials: M
authors.lastname: Shinohara
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D005260:Female; D006391:Hemangioma / Q000175:diagnosis / Q000000981:diagnostic imaging; D006801:Humans; D006984:Hypertrophy / Q000175:diagnosis / Q000000981:diagnostic imaging; D008067:Lipoma / Q000175:diagnosis / Q000000981:diagnostic imaging; D008202:Lymphangioma / Q000175:diagnosis / Q000000981:diagnostic imaging; D008279:Magnetic Resonance Imaging; D008297:Male; D008406:Masseter Muscle / Q000000981:diagnostic imaging / Q000473:pathology*; D008875:Middle Aged; D019042:Muscle Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D009133:Muscular Atrophy / Q000175:diagnosis / Q000000981:diagnostic imaging; D009135:Muscular Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging; D009220:Myositis / Q000175:diagnosis / Q000000981:diagnostic imaging; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography