CTA observation on relationship of right collateral ischemic colitis and calcified plaque of superior mesenteric artery / 中国医学影像技术

ABSTRACT

Objective: To explore the relationship of right collateral ischemic colitis (IC) and calcified plaque of superior mesenteric artery (SMA). Methods Totally 605 patients who underwent CTA of SMA were enrolled and analyzed retrospectively, including 81 patients in IC group and 524 patients in the non-IC group. The detection rate of SMA calcified plaque was compared between the 2 groups. The number, morphology and location of SMA calcified plaque, as well as the degree of stenosis of the opening and the narrowest part of SMA in IC group and the non-IC group were analyzed and compared, and the ROC curve was used to evaluate the efficacy of SMA stenosis degree in diagnosis of IC. Results The incidence of SMA calcified plaques in IC group (13/81, 16.05%) was higher than that in non-IC group (33/524, 6.30%; P=0.002). The number of SMA calcified plaques in IC group was more than that in the non-IC group (P=0.043). Significant difference in the location of calcified plaque was found between the 2 groups (P<0.001). SMA calcified plaques mostly located in the distal segment in IC group, while in the proximal or middle segment in non-IC group. There was no significant difference of plaque morphology between the 2 groups (P=0.421). Statistically significant difference of the narrowest stenosis degree was detected between the 2 groups (P<0.001). The AUC of the narrowest stenosis degree in diagnosis of IC was 0.838 (P<0.001), the sensitivity was 76.92% (10/13), and the specificity was 87.88% (29/33). Conclusion When there are more calcified plaques located in the distal segment of SMA and stenosis degree of the narrowest segment of SMA ≥25%, IC should be considered.