title: Evaluation of imaging findings differentiating extranodal non-Hodgkin's lymphoma from squamous cell carcinoma in naso- and oropharynx.
abstract: OBJECTIVE
  To reveal morphological differences between extranodal non-Hodgkin's lymphoma (NHL) and squamous cell carcinoma of the naso- and oropharynx, and to evaluate the usefulness of diffusion-weighted (DW) and (18)F-fluorodeoxyglucose PET/CT imaging.
  
  
  METHODS
  Imaging findings, signal intensities, apparent diffusion coefficients (ADCs), and maximum standardized uptake values (SUVmax) were assessed.
  
  
  RESULTS
  Wall-thickening type, bilateral symmetry, and absence of nodal necrosis were more frequently seen with NHL. In NHL, signal intensities on DW images were higher, and ADCs was lower. No significant difference in SUVmax was found.
  
  
  CONCLUSIONS
  Only magnetic resonance imaging including DW imaging produced helpful data, eliminating the need for multimodality imaging.
authors: Department of Radiology, Gifu University School of Medicine, 1-1 Yanagido, Gifu 501-1194, Japan. hkato@gifu-u.ac.jp
authors: Hiroki
authors: H
authors: Kato
authors: Masayuki
authors: M
authors: Kanematsu
authors: Shimpei
authors: S
authors: Kawaguchi
authors: Haruo
authors: H
authors: Watanabe
authors: Keisuke
authors: K
authors: Mizuta
authors: Mitsuhiro
authors: M
authors: Aoki
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002294:Carcinoma, Squamous Cell / Q000000981:diagnostic imaging / Q000473:pathology*; D003937:Diagnosis, Differential; D038524:Diffusion Magnetic Resonance Imaging / Q000379:methods; D005260:Female; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008228:Lymphoma, Non-Hodgkin / Q000000981:diagnostic imaging / Q000473:pathology*; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D064847:Multimodal Imaging; D009303:Nasopharyngeal Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D009959:Oropharyngeal Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D049268:Positron-Emission Tomography; D012189:Retrospective Studies
chemical_list: D019788:Fluorodeoxyglucose F18