Objective To analyse the basic characteristics and core syndrome distribution patterns of digestive tract malignant tumors.Methods Following the guidelines and steps of clinical epidemiology and selecting large samples for retrospective study,medical information of 1739...MORE Objective To analyse the basic characteristics and core syndrome distribution patterns of digestive tract malignant tumors.Methods Following the guidelines and steps of clinical epidemiology and selecting large samples for retrospective study,medical information of 1739 c...