title: Irritable bowel syndrome evaluation using computed tomography colonography.
abstract: OBJECTIVE
  To evaluate the morphology of the colon in patients with irritable bowel syndrome (IBS) by using computed tomography colonography (CTC).
  
  
  METHODS
  Twelve patients with diarrhea type IBS (IBS-D), 13 patients with constipation type IBS (IBS-C), 12 patients with functional constipation (FC) and 14 control patients underwent colonoscopy following CTC. The lengths of the rectosigmoid colon, transverse colon and the total colon were measured. The diameters of the rectum, sigmoid colon, descending colon, transverse colon, and ascending colon were measured.
  
  
  RESULTS
  The mean length of the total colon was 156.5 cm in group C, 158.9 cm in group IBS-D, 172.0 cm in group IBS-C, and 188.8 cm in group FC. The total colon in group FC was significantly longer than that in group C (P< 0.05). The mean length of the rectosigmoid colon was 56.2 cm, 55.9 cm, 63.6cm, and 77.4 cm (NS). The mean length of the transverse colon was 49.9 cm, 43.1 cm, 57.0 cm, and 55.0 cm. The transverse colon in group IBS-D was significantly shorter than that in group IBS-C (P< 0.01) and that in group FC (P= 0.02). The mean diameter of the sigmoid colon was 4.0 cm, 3.3 cm, 4.2 cm, and 4.3 cm (NS). The mean diameter of the descending colon was 3.6 cm, 3.1 cm, 3.8 cm, and 4.3 cm. The descending colon diameter in group IBS-D was significantly less than that in group IBS-C (P= 0.03) and that in group FC (P< 0.001). The descending colon diameter in group FC was significantly greater than that in group C (P= 0.04). The mean diameter of the transverse colon was 4.4 cm, 3.3 cm, 4.2 cm, and 5.0 cm (NS).
  
  
  CONCLUSIONS
  CT colonography might contribute the clarification of subtypes of IBS.
authors.affiliation: Hideki Ohgo, Hiroyuki Imaeda, Department of Gastroenterology, Saitama Medical University, Saitama 350-0495, Japan.
authors.forename: Hideki
authors.initials: H
authors.lastname: Ohgo
authors.affiliation: Hideki Ohgo, Hiroyuki Imaeda, Department of Gastroenterology, Saitama Medical University, Saitama 350-0495, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Imaeda
authors.affiliation: Hideki Ohgo, Hiroyuki Imaeda, Department of Gastroenterology, Saitama Medical University, Saitama 350-0495, Japan.
authors.forename: Minoru
authors.initials: M
authors.lastname: Yamaoka
authors.affiliation: Hideki Ohgo, Hiroyuki Imaeda, Department of Gastroenterology, Saitama Medical University, Saitama 350-0495, Japan.
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Yoneno
authors.affiliation: Hideki Ohgo, Hiroyuki Imaeda, Department of Gastroenterology, Saitama Medical University, Saitama 350-0495, Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Hosoe
authors.affiliation: Hideki Ohgo, Hiroyuki Imaeda, Department of Gastroenterology, Saitama Medical University, Saitama 350-0495, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Mizukami
authors.affiliation: Hideki Ohgo, Hiroyuki Imaeda, Department of Gastroenterology, Saitama Medical University, Saitama 350-0495, Japan.
authors.forename: Hidetomo
authors.initials: H
authors.lastname: Nakamoto
mesh_terms: D000368:Aged; D003106:Colon / Q000000981:diagnostic imaging*; D023881:Colonography, Computed Tomographic; D003248:Constipation / Q000209:etiology; D003967:Diarrhea / Q000209:etiology; D005260:Female; D006801:Humans; D043183:Irritable Bowel Syndrome / Q000145:classification / Q000150:complications / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011379:Prognosis; D012007:Rectum / Q000000981:diagnostic imaging; D012189:Retrospective Studies
keywords: Computed tomography colonography; Constipation; Irritable bowel syndrome