Cancer in south Louisiana. Part II: Gastrointestinal tract cancers.

Incidence rates for the most common cancers of the gastrointestinal tract are presented for the 5 geographic regions in South Louisiana for the period 1983-1986. The risk of colorectal cancer, the most frequent GI cancer in males and females, is uniformly lower in these regions of South Louisiana than in other areas of the United States. Gastric cancer rates are significantly high in black males, as are pancreatic cancer rates in whites of both sexes compared to national rates.