Endoscopy 2009; 41(4): 316-322
DOI: 10.1055/s-0028-1119628
Original article

© Georg Thieme Verlag KG Stuttgart · New York

Chromocolonoscopy detects more adenomas than white light colonoscopy or narrow band imaging colonoscopy in hereditary nonpolyposis colorectal cancer screening

R.  Hüneburg1 , F.  Lammert1 , 4 , C.  Rabe1 , N.  Rahner2 , P.  Kahl3 , R.  Büttner3 , P.  Propping2 , T.  Sauerbruch1 , C.  Lamberti1 , 5
  • 1Department of Internal Medicine I, University of Bonn, Bonn, Germany
  • 2Institute of Human Genetics, University of Bonn, Bonn, Germany
  • 3Institute of Pathology, University of Bonn, Bonn, Germany
  • 4Department of Internal Medicine II, University of Homburg, Homburg, Germany
  • 5Department of Internal Medicine, Klinikum Coburg, Coburg, Germany
Further Information

Publication History

submitted4 July 2008

accepted after revision3 December 2008

Publication Date:
01 April 2009 (online)

Background and study aims: Individuals carrying germline mutations in one of the genes responsible for hereditary nonpolyposis colon cancer (HNPCC) have a lifetime risk of up to 80 % of developing colorectal cancer. As there is evidence for a higher incidence of flat adenomatous precursors and because an accelerated adenoma–carcinoma sequence has been postulated for these patients, early detection of these lesions is essential. It was the aim of the present study to assess the detection rate of polypoid lesions by comparing chromocolonoscopy with standard white light colonoscopy and narrow-band imaging (NBI) colonoscopy.

Patients and methods: 109 patients were included (98 with a functionally relevant mutation in a mismatch repair gene, 11 fulfilling the strict Amsterdam criteria). In 47 patients, standard colonoscopy was followed by chromocolonoscopy with indigo carmine. In 62 patients, NBI was performed first followed by chromocolonoscopy.

Results: A total of 128 hyperplastic and 52 adenomatous lesions were detected. In the first series, 0.5 lesions/patient were identified by standard colonoscopy and 1.5 lesions/patient by chromocolonoscopy (P < 0.001). In the second series, 0.7 lesions/patient were detected by NBI colonoscopy and 1.8 lesions/patient by chromocolonoscopy (P = 0.01). At least one adenoma was detected in 15 % of patients by both standard and NBI colonoscopy compared with 28 % of patients by chromocolonoscopy.

Conclusion: According to this study, chromocolonoscopy detects significantly more hyperplastic and, in particular, adenomatous lesions than standard white light colonoscopy or NBI.

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T. SauerbruchMD 

Department of Internal Medicine I
University of Bonn

Sigmund-Freud Straße 25
D-53115 Bonn
Germany

Fax: +49-228-28714322

Email: tilman.sauerbruch@ukb.uni-bonn.de

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