title: Non-Hodgkin lymphoma: contribution of chest CT in the initial staging evaluation.
abstract: OBJECTIVE
  To analyze incremental information derived from routinely obtained chest computed tomographic (CT) scans compared with chest radiographs in newly diagnosed non-Hodgkin lymphoma and the effect of this information on staging and therapy.
  
  
  METHODS
  Abnormalities on chest radiographs and CT scans obtained at specific sites were prospectively identified in 181 consecutive patients with no previous treatment. When discrepant information was found, the effect on staging and treatment was determined.
  
  
  RESULTS
  CT and chest radiographic findings were negative in 99 (55%) patients. CT findings were positive and chest radiograph findings were negative in 17 (9%). Both chest radiograph and CT findings were positive in 65 (36%) patients, 16 with identical sites of disease and 49 with more extensive intrathoracic disease at CT. Most stage changes occurred in the diffuse large cell histologic subtype.
  
  
  CONCLUSIONS
  Although routine chest CT findings increased stage of disease in some patients, it had no effect on initial treatment of newly diagnosed non-Hodgkin lymphoma at this institution.
authors.affiliation: Department of Radiology, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA.
authors.forename: R A
authors.initials: RA
authors.lastname: Castellino
authors.forename: S
authors.initials: S
authors.lastname: Hilton
authors.forename: J P
authors.initials: JP
authors.lastname: O'Brien
authors.forename: C S
authors.initials: CS
authors.lastname: Portlock
mesh_terms: D005260:Female; D006801:Humans; D008228:Lymphoma, Non-Hodgkin / Q000000981:diagnostic imaging* / Q000453:epidemiology / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D015995:Prevalence; D013899:Thoracic Neoplasms / Q000000981:diagnostic imaging* / Q000453:epidemiology / Q000473:pathology; D014057:Tomography, X-Ray Computed