title: Computed tomographic features of Legionella pneumophila pneumonia in 38 cases.
abstract: OBJECTIVE
  To characterize the imaging features of Legionella pneumophila pneumonia (LPP).
  
  
  METHODS
  Imaging findings of computed tomography (CT) in 38 cases of microbiologically or serologically determined LPP were analyzed and compared with those of 35 cases of Streptococcus pneumoniae pneumonia.
  
  
  RESULTS
  In cases with LPP, abnormal opacities were distributed in a single lobe in 5 cases, in multiple lobes unilaterally in 10 cases, and multifocally and bilaterally in 23 cases. All cases showed consolidation and/or ground glass opacity in lung fields. Sharply demarcated peribronchovascular foci of consolidation intermingled with ground glass opacity were noted in 24 cases (24 of 38, 63%), whereas imaging features were seen in only 3 cases (3 of 35, 9%) of Streptococcus pneumoniae pneumonia. These CT patterns have nothing to do with clinical features such as age, sex, severity of disease, and time between onset of disease and CT examination.
  
  
  CONCLUSIONS
  Imaging features of LPP on CT include bilateral and unilateral single and multifocal consolidation and ground opacity. Sharply demarcated peribronchovascular foci of consolidation intermingled with ground glass opacity seem to be one of the most frequent CT appearances of LPP.
authors.affiliation: Department of Diagnostic Radiology, Tokyo Metropolitan Komagome Hospital, Tokyo, Japan. fmksakai@yahoo.co.jp
authors.forename: Fumikazu
authors.initials: F
authors.lastname: Sakai
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Tokuda
authors.forename: Hajime
authors.initials: H
authors.lastname: Goto
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Tateda
authors.forename: Takeshi
authors.initials: T
authors.lastname: Johkoh
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Nakamura
authors.forename: Takeshi
authors.initials: T
authors.lastname: Matsuoka
authors.forename: Akira
authors.initials: A
authors.lastname: Fujita
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Nakamori
authors.forename: Shigeyuki
authors.initials: S
authors.lastname: Aoki
authors.forename: Shinichi
authors.initials: S
authors.lastname: Ohdama
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D007877:Legionnaires' Disease / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D011018:Pneumonia, Pneumococcal / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed