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CT colonography for surveillance of patients with colorectal cancer: Systematic review and meta-analysis of diagnostic efficacy

  • Gastrointestinal
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Abstract

Purpose

To review primary research evidence investigating performance of CT colonography for colorectal cancer surveillance. The financial impact of using CT colonography for surveillance was also estimated.

Methods

We identified primary studies of CT colonography for surveillance of colorectal cancer patients. A summary ROC curve was constructed. Inter-study heterogeneity was explored using the I2 value. Financial impact was estimated for a theoretical cohort of patients, based on Cancer Research UK statistics.

Results

Seven studies provided data on 880 patients. Five of seven studies (765 patients) were included for qualitative analysis. Sensitivity of CT colonography for detection of anastomotic recurrence was 95 % (95 % CI 62 − 100), specificity 100 % (95 % CI 75 − 100) and sensitivity for metachronous cancers was 100 %. No statistical heterogeneity was detected (I2 = 0 %). We estimated that CT colonography as a 'single test' alternative to colonoscopy and standard CT for surveillance would potentially save €20,785,232 (£14,803,404) for an annual cohort of UK patients.

Conclusion

CT colonography compares favourably to colonoscopy for detection of anastomotic recurrence and metachronous colorectal cancer, and appears financially beneficial. These findings should be considered alongside limitations of small patient numbers and high clinical heterogeneity between studies.

Key Points

• CT colonography compares favourably to colonoscopy/standard CT for colorectal cancer surveillance.

• CT colonography offers single-test luminal, serosal and extra-colonic assessment.

• CT colonography is a potentially cost-saving alternative to standard surveillance protocols.

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Acknowledgments

The scientific guarantor of this publication is David Burling. The authors of this manuscript declare relationships with the following companies: Steve Halligan has a non-renumerated research arrangement with iCAD inc. and has received speaker fees from BRACCO SpA regarding CT colonography. David Burling is the lead for the St Marks CT Colonography service and receives an educational grant from Bracco. The remaining authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article. The authors state that this work has not received any funding. An expert in statistics or biometry was not consulted or required. Thanos Athanasiou kindly provided statistical advice for this manuscript. Mallikarjuna Uppara and George Malietzis have previous statistical experience with meta-analyses. Institutional Review Board approval was not required by our institution for secondary research using existing available literature. The study subjects have been previously reported in existing literature, as referenced in the manuscript and below:

You YT, Chang Chien CR, Wang JY, et al. Evaluation of contrast-enhanced computed tomographic colonography in detection of local recurrent colorectal cancer. World J Gastroenterol. 2006;12(1):123-126.

Fletcher JG, Johnson CD, Krueger WR, et al. Contrast-enhaned CT colonography in recurrent colorectal carcinoma: Feasibility of simultaneous evaluation for metastatic disease, local recurrence and metachronous neolasia in colorectal carcinoma. AJR Am J Roentgenol. 2002;(February):283-290.

Laghi A, Iannaccone R, Bria E, et al. Contrast-enhanced computed tomographic colonography in the follow-up of colorectal cancer patients: a feasibility study. Eur Radiol. 2003;13:883-889. doi:10.1007/s00330-002-1696-4.

Leonardou P, Striggaris K, Pappas P, et al. Screening of patients after colectomy: Virtual colonography. Abdom Imaging. 2006;31(December 2005):521-528. doi:10.1007/s00261-005-0120-3.

Amitai MM, Fidder H, Avidan B, et al. Contrast-enhanced CT colonography with 64-slice MDCT compared to endoscopic colonoscopy in the follow-up of patients after colorectal cancer resection. Clin Imaging. 2009;33(6):433-438. doi:10.1016/j.clinimag.2009.01.002.

Neri E, Vagli P, Turini F, et al. Post-surgical follow-up of colorectal cancer: Role of contrast-enhanced CT colonography. Abdom Imaging. 2010;35(December 2009):669-675. doi:10.1007/s00261-009-9596-6.

Kim HJ, Park SH, Pickhardt PJ, et al. CT Colonography for Combined Colonic and Extracolonic Resection of Colorectal Cancer. Radiology. 2010;257(3). doi:10.1148/radiol.10100385/-/DC1.

Methodology: systematic review and meta-analysis, performed at one institution.

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Corresponding author

Correspondence to David Burling.

Appendix

Appendix

FP is a Gastrointestinal Radiology Fellow at St. Mark’s Hospital, Harrow, UK, and has 6 years of specialty training in clinical radiology.

MU and GM are experienced Clinical Research Fellows in Surgical Epidemiology at the Trials and Outcome Centre (SETOC), St Mark’s Hospital, Harrow, UK, and have previously undertaken several systematic reviews and meta-analyses.

OF is a Consultant Colorectal Surgeon, Surgical Epidemiology, Trials and Outcome Centre (SETOC) St Mark’s Hospital and Honorary Senior Lecturer Imperial college, London, UK.

TA is a Professor in the Department of Surgery at Imperial College London, UK. He has published over 70 systematic reviews and meta-analyses.

SH is a Professor of Gastrointestinal Radiology, University College London, UK, and has a special interest in colorectal cancer imaging with CT colonography.

DB is a Consultant Gastrointestinal Radiologist at St. Mark’s Hospital, Harrow, UK.

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Porté, F., Uppara, M., Malietzis, G. et al. CT colonography for surveillance of patients with colorectal cancer: Systematic review and meta-analysis of diagnostic efficacy. Eur Radiol 27, 51–60 (2017). https://doi.org/10.1007/s00330-016-4319-1

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