[Geographic spatial pattern of digestive system cancers in Yiwu city].

Objective: To analyze the geographic spatial patterns and risk areas of main digestive system cancers in Yiwu city.

Methods: Newly diagnosed cases of esophageal, gastric and colorectal cancer during 2010-2014 were obtained from Yiwu Center for Disease Control and Prevention (CDC). The household registration population data in 2013 were obtained from public security bureau.