In the U.S. population, the average annual age-adjusted incidence rates per 100 000 population of carcinomas of the small intestine based on 1992-2006 data from the Surveillance, Epidemiology and End Results (SEER) were 1.45 and 1.00 for males and females respectively. Rates for blacks were more than twice those of whites (1.29 vs 0.63)
Small intestinal cancer: a population-based study of incidence and survival patterns in the United States, 1992 to 2006.Qubaiah O, Devesa SS, Platz CE, Huycke MM, Dores GM
Cancer Epidemiol Biomarkers Prev. 2010 Aug; 19(8):1908-18.