title: Continuation of gas from the right perirenal space into the bare area of the liver.
abstract: OBJECTIVE
  It is difficult to explain some CT findings pertaining the anatomic relationship between the bare area of the liver and the right retroperitoneal space on the basis of the traditional three compartment concept of retroperitoneal anatomy. The purpose of this article is to ascertain and illustrate possible communication between the bare area of the liver and the right perirenal space in patients with gas-forming retroperitoneal infection.
  
  
  METHODS
  We reviewed CT findings in 24 cases with retroperitoneal gas-forming condition with particular emphasis on the extent of the infection and resultant distribution of gas.
  
  
  RESULTS
  CT images showed gas within the right perirenal space extended upward directly into the bare area of the liver in six cases.
  
  
  CONCLUSIONS
  The right perirenal space is considered open toward the bare area of the liver. Therefore, gas within the perirenal space may communicate directly with the bare area of the liver.
authors.affiliation: Department of Radiology, Samsung Medical Center, Seoul, Korea.
authors.forename: J H
authors.initials: JH
authors.lastname: Lim
authors.forename: B
authors.initials: B
authors.lastname: Kim
authors.forename: Y H
authors.initials: YH
authors.lastname: Auh
mesh_terms: D004646:Emphysema / Q000000981:diagnostic imaging* / Q000209:etiology; D005260:Female; D006801:Humans; D007668:Kidney / Q000000981:diagnostic imaging*; D008099:Liver / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D011704:Pyelonephritis / Q000150:complications; D012187:Retroperitoneal Space; D014057:Tomography, X-Ray Computed / Q000295:instrumentation