title: Usefulness of endoscope guided transabdominal ultrasonography in T staging of colorectal cancer.
abstract: OBJECTIVE
  We investigated the efficacy of endoscope guided transabdominal ultrasonography (EGTUS) for the evaluating the depth of colorectal cancer invasion.
  
  
  METHODS
  The subjects were 52 patients with colon cancer and 30 patients with rectal cancer who underwent transabdominal US and curative surgery. During endoscopy, we applied transabdominal US by filling the area around the tumor with de-gassed water. The accuracy of depth invasion assessment using EGTUS was compared with that using endoscopic, computed tomography (CT), surgical or histological findings.
  
  
  RESULTS
  The tumor detection rate was 75.6% (62/82), 88.5% (46/52) for colon cancer and 53.3% (16/30) for rectal cancer. The diagnostic accuracies of EGTUS, endoscopic, CT and surgical findings were 87.1% (54/62), 73.2% (60/82), 66.7% (46/69), 65.9% (54/82), respectively. The diagnostic accuracy of EGTUS was 100% (2/2), 66.7% (4/6), and 90.0% (44/49) for T1, T2 and T3 cancer, respectively.
  
  
  CONCLUSIONS
  The results suggest that EGTUS is useful for evaluating preoperative T staging of colorectal cancer.
authors.forename: Satoru
authors.initials: S
authors.lastname: Seo
authors.forename: Yuhei
authors.initials: Y
authors.lastname: Hamaguchi
authors.forename: Yukihiro
authors.initials: Y
authors.lastname: Okuda
authors.forename: Tatsuki
authors.initials: T
authors.lastname: Arimitsu
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Babazono
authors.forename: Junya
authors.initials: J
authors.lastname: Tanaka
authors.forename: Hidemitsu
authors.initials: H
authors.lastname: Sugimoto
authors.forename: Yukinobu
authors.initials: Y
authors.lastname: Takimoto
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Hirai
authors.forename: Shuzo
authors.initials: S
authors.lastname: Ueda
authors.forename: Toyotsugu
authors.initials: T
authors.lastname: Ota
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Fujimoto
authors.forename: Fumitaka
authors.initials: F
authors.lastname: Oike
authors.forename: Akira
authors.initials: A
authors.lastname: Mitsuyosh
mesh_terms: D015179:Colorectal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D019160:Endosonography; D005260:Female; D006801:Humans; D008297:Male; D009361:Neoplasm Invasiveness; D009367:Neoplasm Staging; D011237:Predictive Value of Tests; D014057:Tomography, X-Ray Computed