title: CT detection of dry peritoneal seeding in patients with advanced gastric cancer.
abstract: OBJECTIVE
  To determine the significant CT findings of dry peritoneal seeding (DPS) in patients with advanced gastric cancer (AGC) and to assess whether radiologists' performance in the detection of DPS can be improved using these significant CT findings.
  
  
  METHODS
  Two radiologists reviewed CT images of AGC patients with DPS and without seeding for the presence or absence of various CT findings suggesting peritoneal seeding, in consensus. Significant CT findings for DPS were determined using Fisher's exact test. Two other observers, blinded to the results of the consensus review during the first session but not during the second session, evaluated the presence or absence of DPS independently on a five-point scale. Each observer's performance was evaluated using a pair-wise comparison of the receiver operating characteristic (ROC) curves.
  
  
  RESULTS
  Soft tissue nodule or plaque on the peritoneal surface was the only significant CT finding of DPS (p=0.014). The areas under the ROC curves of the two observers were not significantly different between the two review sessions.
  
  
  CONCLUSIONS
  Soft tissue nodule or plaque on the peritoneal surface was a significant CT finding for the detection of DPS. However, radiologists' performance for the detection of DPS did not improve despite knowledge of this finding.
authors: Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
authors: Ji-Eun
authors: JE
authors: Kim
authors: Min Woo
authors: MW
authors: Lee
authors: Jung Won
authors: JW
authors: Moon
authors: Kyoung Doo
authors: KD
authors: Song
authors: Yulri
authors: Y
authors: Park
authors: Min Jung
authors: MJ
authors: Park
authors: Dongil
authors: D
authors: Choi
authors: Soon Jin
authors: SJ
authors: Lee
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001706:Biopsy; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D010534:Peritoneal Neoplasms / Q000000981:diagnostic imaging* / Q000556:secondary*; D011237:Predictive Value of Tests; D012372:ROC Curve; D015203:Reproducibility of Results; D012189:Retrospective Studies; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D014057:Tomography, X-Ray Computed