Objective To determine the relationship between the death of diabetic inpatients and tumors. Methods We analyzed the database of cause of death among inpatients with diabetes in 15 provinces and municipalities from 1991 through 2005,and determined tumor as major cause of death based on ICD-10.Results The 520 diabetic inpatients(18.0%) showed tumor as major cause of death from the 2895 diabetic inpatients who died in hospital.Sites of the top 5 tumors as cause of death were lung,liver,hematological system,st...