title: Aberrant gastric venous drainage into the medial segment: demonstration by color Doppler sonography.
abstract: BACKGROUND
  Aberrant gastric venous drainage (AGVD) into the posterior edge of the medial segment of the liver (segment IV) is the main cause of pseudolesion on computed tomography (CT) during arterial portography. We estimated the prevalence of AGVD into the medial segment of the liver with color and power Doppler ultrasound (US).
  
  
  METHODS
  Screening gray-scale and color Doppler and power Doppler US were performed in 100 consecutive patients. AGVD was defined as a venous structure that ascended parallel to the main portal vein and drained independently into segment IV.
  
  
  RESULTS
  AGVDs were observed in eight of 100 patients (8%) with color and power Doppler US. Power Doppler US depicted these veins more clearly than did color Doppler US. Gray-scale US did not show any AGVDs. Two of eight patients with AGVDs detected by color Doppler US underwent celiac arteriography and CT during arterial portography (CTAP). In these two patients, celiac arteriography directly demonstrated AGVDs draining into segment IV, which revealed nontumorous perfusion defects (pseudolesions) on CTAP.
  
  
  CONCLUSIONS
  Color and power Doppler US are useful imaging methods for demonstrating AGVDs.
authors.affiliation: Department of Radiology, Kanazawa University, School of Medicine, Takara-machi 13-1, Kanazawa 920, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Gabata
authors.forename: O
authors.initials: O
authors.lastname: Matsui
authors.forename: M
authors.initials: M
authors.lastname: Kadoya
authors.forename: K
authors.initials: K
authors.lastname: Ueda
authors.forename: Y
authors.initials: Y
authors.lastname: Kawamori
authors.forename: J
authors.initials: J
authors.lastname: Yoshikawa
authors.forename: K
authors.initials: K
authors.lastname: Nobata
authors.forename: Y
authors.initials: Y
authors.lastname: Fujinaga
authors.forename: T
authors.initials: T
authors.lastname: Matsuoka
authors.forename: T
authors.initials: T
authors.lastname: Takashima
mesh_terms: D000013:Congenital Abnormalities / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D008099:Liver / Q000098:blood supply*; D008297:Male; D008875:Middle Aged; D011172:Portography; D013270:Stomach / Q000098:blood supply*; D014057:Tomography, X-Ray Computed; D018615:Ultrasonography, Doppler, Color; D014680:Veins / Q000002:abnormalities / Q000000981:diagnostic imaging