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Factors of incomplete colonoscopy for stenosing colorectal cancer: CT colonography features

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Abstract

Purpose

The purpose of this study was to examine the relation between computed tomography colonoscopy (CTC) features of colorectal cancer (CRC) and incomplete colonoscopy.

Materials and methods

The subjects of this retrospective study consisted of 108 patients with advanced CRC (57 men, 51 women; age range, 32–87 years; median, 65 years) who underwent CTC. We compared local CTC features between the groups of complete (n = 74) and incomplete colonoscopy (n = 34). We performed a receiver operating characteristic (ROC) analysis to assess a diagnostic performance of CTC features to predict incomplete colonoscopy.

Results

The cross-sectional area of tumor and stenosis of complete colonoscopy group were significantly smaller and larger than those of incomplete colonoscopy group (p = 0.001 and < 0.001). Circumferential tumor extent rate (CER) showed significantly higher in the incomplete colonoscopy group than complete colonoscopy group (p < 0.001). In the ROC analysis, the cross-sectional area of stenosis showed AUC of 0.916, which was the best to predict incomplete colonoscopy.

Conclusion

CTC features including larger cross-sectional area of tumor, smaller cross-sectional area of stenosis and 100% CER were significantly associated with incomplete colonoscopy for the patients with CRC.

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Funding

The authors did not accept any grant.

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Authors and Affiliations

  1. Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, Japan

    Daisuke Tsurumaru, Yusuke Nishimuta, Satohiro Kai & Akihiro Nishie

  2. Department of Surgery and Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan

    Eiji Oki

Authors
  1. Daisuke Tsurumaru
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  2. Yusuke Nishimuta
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  3. Satohiro Kai
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  4. Eiji Oki
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  5. Akihiro Nishie
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Corresponding author

Correspondence to Daisuke Tsurumaru.

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Ethical approval

This study was approved by the institutional review board of our institution.

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Tsurumaru, D., Nishimuta, Y., Kai, S. et al. Factors of incomplete colonoscopy for stenosing colorectal cancer: CT colonography features. Jpn J Radiol 38, 973–978 (2020). https://doi.org/10.1007/s11604-020-00999-1

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  • DOI: https://doi.org/10.1007/s11604-020-00999-1

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