title: [Value of multidetector-row CT in the preoperative prediction of peritoneal metastasis from gastric cancer: a single-center and large-scale study].
abstract: OBJECTIVE
  To investigate the value of multidetector-row computed tomography (MDCT) in preoperatively predicting peritoneal metastasis of gastric cancer and to evaluate the indication for laparoscopic staging of gastric cancer on the basis of MDCT features.
  
  
  METHODS
  Six hundred and forty gastric cancer patients underwent preoperative MDCT examination, and the results of MDCT were compared with surgical and pathological findings. In addition, the relationship between MDCT features (depth of invasion, lymph node metastasis status, tumor size, and thickness of tumor) and peritoneal metastasis of gastric cancer was analyzed.
  
  
  RESULTS
  The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of MDCT in predicting peritoneal metastasis of gastric cancer were 51.0% (25/49), 99.3% (587/591), 86.2% (25/29), 96.1% (587/611), and 95.6% (612/640), respectively. Univariable analysis showed that all the four MDCT features (depth of invasion, lymph node metastasis status, tumor size, and tumor thickness) of gastric cancer were significantly correlated with the peritoneal metastasis of gastric cancer. None of the patients diagnosed with stage T(0~2)N(x)M(0) or T(x)N(0)M(0) gastric cancer by MDCT were found to have peritoneal metastasis. Receiver operating characteristic (ROC) analysis showed that the accuracy of the tumor size and thickness of gastric cancer in determining peritoneal metastasis was high(area under ROC curve was 0.83 and 0.75, respectively). Multivariable analysis showed that only tumor size was significantly correlated with the peritoneal metastasis from gastric cancer.
  
  
  CONCLUSIONS
  The clinical value of MDCT in preoperative prediction of peritoneal metastasis from gastric cancer is favorable. Laparoscopy can be avoided in patients with small tumor size or stage T(0~2)N(x)M(0) or T(x)N(0)M(0) gastric cancer diagnosed by MDCT due to lower incidence of peritoneal metastasis.
authors.affiliation: Department of General Surgery, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai Institute of Digestive Surgery, Shanghai, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Yan
authors.forename: Zheng-gang
authors.initials: ZG
authors.lastname: Zhu
authors.forename: Min
authors.initials: M
authors.lastname: Yan
authors.forename: Ke-min
authors.initials: KM
authors.lastname: Chen
authors.forename: Jun
authors.initials: J
authors.lastname: Chen
authors.forename: Ming
authors.initials: M
authors.lastname: Xiang
authors.forename: Ming-min
authors.initials: MM
authors.lastname: Chen
authors.forename: Bing-ya
authors.initials: BY
authors.lastname: Liu
authors.forename: Hao-ran
authors.initials: HR
authors.lastname: Yin
authors.forename: Yan-zhen
authors.initials: YZ
authors.lastname: Lin
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009367:Neoplasm Staging / Q000379:methods; D010534:Peritoneal Neoplasms / Q000000981:diagnostic imaging* / Q000556:secondary; D011237:Predictive Value of Tests; D012680:Sensitivity and Specificity; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D014057:Tomography, X-Ray Computed / Q000379:methods*; D055815:Young Adult