title: Contrast-enhanced multidetector computerized tomography for odontogenic cysts and cystic-appearing tumors of the jaws: is it useful?
abstract: OBJECTIVE
  The purpose of this study was to investigate the usefulness of computerized tomography (CT), particularly contrast-enhanced CT, in differentiation of jaw cysts and cystic-appearing tumors.
  
  
  METHODS
  We retrospectively analyzed contrast-enhanced CT images of 90 patients with odontogenic jaw cysts or cystic-appearing tumors. The lesion size and CT values were measured and the short axis to long axis (S/L) ratio, contrast enhancement (CE) ratio, and standard deviation ratio were calculated.
  
  
  RESULTS
  The lesion size and the S/L ratio of keratocystic odontogenic tumors were significantly different from those of radicular cysts and follicular cysts. There were no significant differences in the CE ratio among the lesions.
  
  
  CONCLUSIONS
  Multidetector CT provided diagnostic information about the size of odontogenic cysts and cystic-appearing tumors of the jaws that was related to the lesion type, but showed no relation between CE ratio and the type of these lesions.
authors.affiliation: Department of Oral and Maxillofacial Radiology, Osaka University Graduate School of Dentistry, Osaka, Japan. kakimoto@dent.osaka-u.ac.jp
authors.forename: Naoya
authors.initials: N
authors.lastname: Kakimoto
authors.forename: Jira
authors.initials: J
authors.lastname: Chindasombatjaroen
authors.forename: Seiki
authors.initials: S
authors.lastname: Tomita
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Shimamoto
authors.forename: Yuka
authors.initials: Y
authors.lastname: Uchiyama
authors.forename: Yoko
authors.initials: Y
authors.lastname: Hasegawa
authors.forename: Mitsunobu
authors.initials: M
authors.lastname: Kishino
authors.forename: Shumei
authors.initials: S
authors.lastname: Murakami
authors.forename: Souhei
authors.initials: S
authors.lastname: Furukawa
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003287:Contrast Media; D016002:Discriminant Analysis; D005260:Female; D006801:Humans; D007472:Iohexol; D008297:Male; D008875:Middle Aged; D009807:Odontogenic Cysts / Q000000981:diagnostic imaging*; D009808:Odontogenic Tumors / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D018709:Statistics, Nonparametric; D014057:Tomography, X-Ray Computed / Q000379:methods*
chemical_list: D003287:Contrast Media; D007472:Iohexol