title: CT findings in acute, subacute, and chronic ischemic colitis: suggestions for diagnosis.
abstract: OBJECTIVE
  This paper aims at evaluating CT findings of occlusive and nonocclusive ischemic colitis (IC), in correlation with the etiology and the different phases of the disease.
  
  
  METHODS
  CT examination and clinical history of 32 patients with proven IC were retrospectively reviewed. The CT findings were analyzed according to the different phases of the disease (acute, subacute, and chronic).
  
  
  RESULTS
  Among the 32 CT examinations performed in the acute phase, 62.5% did not present signs of occlusion of the superior mesenteric artery (SMA) or inferior mesenteric artery (IMA), whereas IMA occlusion was detected in 37.5% of CT examinations. In the acute phase, the presence of pericolic fluid was found in 100% of patients undergoing progressive resorption from acute to subacute phase if an effective reperfusion occurred; the bowel wall thickening was observed in 28.1% patients in acute phase and in 86.4% patients evaluated in subacute phase. The unthickened colonic wall was found in all conditions where ischemia was not followed by effective reperfusion (71.9% of cases), and it was never found in chronic phase, when the colon appeared irregularly thickened.
  
  
  CONCLUSIONS
  CT allows determining the morphofunctional alterations associated with the IC discriminating the occlusive forms from the nonocclusive forms. CT, furthermore, allows estimating the timing of ischemic damage.
authors.affiliation: Department of Radiology, Second University of Naples, Piazza Miraglia 2, 80138 Napoli, Italy.
authors.forename: Francesca
authors.initials: F
authors.lastname: Iacobellis
authors.affiliation: Department of Radiology, Second University of Naples, Piazza Miraglia 2, 80138 Napoli, Italy.
authors.forename: Daniela
authors.initials: D
authors.lastname: Berritto
authors.affiliation: Department of Radiology, Stanford University School of Medicine, 300 Pasteur Drive, Room S-072, Stanford, CA 94305-5105, USA.
authors.forename: Dominik
authors.initials: D
authors.lastname: Fleischmann
authors.affiliation: Department of Radiology, Second University of Naples, Piazza Miraglia 2, 80138 Napoli, Italy.
authors.forename: Giuliano
authors.initials: G
authors.lastname: Gagliardi
authors.affiliation: Emergency Department, "A. Cardarelli" Hospital, Via A. Cardarelli 9, 80131 Napoli, Italy.
authors.forename: Antonio
authors.initials: A
authors.lastname: Brillantino
authors.affiliation: Department of Medical, Surgical and Neuro Sciences, Section of Radiological Sciences, University of Siena, Viale Bracci 10, 53100 Siena, Italy.
authors.forename: Maria Antonietta
authors.initials: MA
authors.lastname: Mazzei
authors.affiliation: Department of Radiology, Second University of Naples, Piazza Miraglia 2, 80138 Napoli, Italy.
authors.forename: Roberto
authors.initials: R
authors.lastname: Grassi
mesh_terms: D000208:Acute Disease; D000368:Aged; D000369:Aged, 80 and over; D000792:Angiography / Q000379:methods*; D002908:Chronic Disease; D017091:Colitis, Ischemic / Q000145:classification* / Q000000981:diagnostic imaging*; D003106:Colon / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007558:Italy; D008297:Male; D008638:Mesenteric Arteries / Q000000981:diagnostic imaging*; D008875:Middle Aged; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*