Gut Liver.
2018 Sep;12(5):537-543. 10.5009/gnl17485.
Frequency and Characteristics of Interval Colorectal Cancer in Actual Clinical Practice: A KASID Multicenter Study
- Affiliations
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- 1Division of Gastroenterology and Hepatology, Department of Internal Medicine, Yeungnam University College of Medicine, Daegu, Korea.
- 2Department of Internal Medicine, Konyang University College of Medicine, Daejeon, Korea. kchuh2020@hanmail.net
- 3Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.
- 4Department of Internal Medicine, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Korea.
- 5Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
- 6Department of Internal Medicine, Chonbuk National University Medical School, Jeonju, Korea.
- 7Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea.
- 8Department of Internal Medicine, Inje University Haeundae Paik Hospital, Busan, Korea.
- 9Department of Internal Medicine, Chosun University College of Medicine, Gwangju, Korea.
- 10Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
- 11Department of Internal Medicine, Eulji Hospital, Eulji University College of Medicine, Seoul, Korea.
- KMID: 2424082
- DOI: http://doi.org/10.5009/gnl17485
Abstract
- BACKGROUND/AIMS
The aims of the present study were to determine the frequency of interval colorectal cancers (CRCs) after surveillance colonoscopy and to compare the clinicopathologic features and survival outcomes with those of non-interval CRCs.
METHODS
From January 2003 to December 2013, 66,016 follow-up colonoscopies for 38,412 patients performed within recommended time were reviewed retrospectively based on data from 11 tertiary hospitals in South Korea. To compare clinicopathologic features and survival rates for interval CRC, 106 patients with non-interval CRC matched in age and gender were included.
RESULTS
Among the 66,016 colonoscopies performed within the surveillance period, 63 cases (63/66,016) of interval CRC were detected, and 53 were finally included in the analysis. The mean age was 69.9±8.8 years, and the male to female ratio was 1.94:1. Although the occurrence rate of cancer in the right side colon was higher than that of non-interval CRC, interval CRCs were predominantly left sided. Other clinicopathologic features and overall survival were not significantly different between the two groups. Missed lesion was suspected to be the most common cause (29 cases, 54.7%).
CONCLUSIONS
The frequency of interval CRC among patients who had undergone a surveillance colonoscopy was 0.095%. While sharing some similar clinical features and survival outcomes, interval CRCs in Korea developed more often in males and on the left side in contrast to results from Western studies.
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