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Epidemiology of Esophageal Cancer in Yanting - Regional Report of a National Screening Programme in China

  • Wang, Xiao (Sichuan Cancer Hospital & Institute) ;
  • Fan, Jin-Chuan (Sichuan Cancer Hospital & Institute) ;
  • Wang, An-Rong (Sichuan Cancer Hospital & Institute) ;
  • Leng, Yue (Department of Public Health and Primary Care, University of Cambridge) ;
  • Li, Jun (Yanting Cancer Institute) ;
  • Bao, Yu (Sichuan Cancer Hospital & Institute) ;
  • Wang, Ying (Sichuan Cancer Hospital & Institute) ;
  • Yang, Qing-Feng (Yanting Cancer Institute) ;
  • Ren, Yu (Yanting Cancer Institute)
  • Published : 2013.04.30

Abstract

Background and Objectives: Yanting in Sichuan Province is one of the highest risk areas of esophageal cancer (EC) in the world. We here summarize the epidemiology of EC in Yanting using data from the national screening programme during 2006-2011. Methods: Random cluster sampling was used to select a proportion of natural villages from six towns in Yanting, and residents aged 40-69 years old were invited for screening. Participants were screened using endoscopy with iodine staining and then confirmed by histological examinations. Results: The overall detection rates of low-grade hyperplasia (LH), moderate hyperplasia (MH), high-grade hyperplasia (HH), carcinoma in situ (CIS), intramucosal carcinoma (IC) and invasive carcinoma (INC) were 5.33%, 1.28%, 0.68%, 0.15%, 0.06% and 0.29%, respectively. The detection rates of LH, MH, HH and INC increased with age, reaching the peak among those aged 60-65 years, and the prevalences of LH and MH were higher among men than among women. In addition, the detection rates of hyperplasia were much higher in mountainous than in hilly areas. Conclusions: Among the high risk population, there are a great number of people with early-stage EC or precancerous conditions who do not have presenting symptoms. In particular, the elderly, men, or those living in mountainous areas are the most vulnerable population. It is therefore important to reinforce health education and screening services among such high risk populations.

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