title: Preoperative staging by multidetector-row computed tomography in patients with rectal carcinoma.
abstract: BACKGROUND
  Multidetector-row computed tomography (MDCT, or multi-slice CT) has been introduced in 2000. So far, there has been no published study on this modality in patients with rectal carcinoma.
  
  
  METHODS
  Twenty patients with rectal carcinoma were preoperatively examined by MDCT and conventional CT (CCT). Diagnostic accuracies of both modalities were compared regarding the evaluation of depth of tumor invasion (Tis/T1/T2, T3, T4) and lymph node metastasis based on the pathologic findings.
  
  
  RESULTS
  Although CCT detected a tumor in 13 (65%) of 20 patients, MDCT revealed a tumor in all 20 patients (P = 0.004). Regarding depth of tumor invasion, the concordance rate was significantly higher for MDCT (20/20: 100%) than for CCT (12 of 20: 60%; P = 0.002). Regarding lymph node metastasis, the overall accuracy was 70.0% in CCT, and also 70.0% in MDCT.
  
  
  CONCLUSIONS
  MDCT was superior to CCT in the evaluation of depth of tumor invasion, but was equal to CCT in the evaluation of lymph node metastasis.
authors.affiliation: First Department of Surgery, Kyorin University, Mitaka, Tokyo, Japan.
authors.forename: Hiroyoshi
authors.initials: H
authors.lastname: Matsuoka
authors.forename: Akihisa
authors.initials: A
authors.lastname: Nakamura
authors.forename: Tadahiko
authors.initials: T
authors.lastname: Masaki
authors.forename: Masanori
authors.initials: M
authors.lastname: Sugiyama
authors.forename: Taro
authors.initials: T
authors.lastname: Takahara
authors.forename: Junichi
authors.initials: J
authors.lastname: Hachiya
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Atomi
mesh_terms: D000230:Adenocarcinoma / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001707:Biopsy, Needle; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009367:Neoplasm Staging; D011237:Predictive Value of Tests; D011300:Preoperative Care; D011336:Probability; D012004:Rectal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*