Incidence of XXXX in the US by histologic type.

@entity1 @entity5 @entity957 @entity418 @entity420
Data from nine US population-based @entity5 registries participating in the Surveillance, Epidemiology, and End Results (SEER) program from 1973 through 1982 were analyzed to examine demographic characteristics related to the occurrence of the two major types of @entity5 . The overall annual incidence rate per 100,000 @entity1 was 2.6 for @entity957 and 0.4 for @entity420 . The sex ratio for @entity420 varied from one age group to the next and was highest in the 50- to 59-year-old group. It was relatively the same for @entity957 . The male-to-female ratio was higher for @entity420 (seven in whites and 10 in blacks) than for @entity957 (three and four, respectively). The highest sex-specific ratio for @entity420 occurred in the lower third of the esophagus. Blacks had a fourfold to fivefold higher rate of @entity957 than whites, but the rate of @entity420 in blacks was 30% of the rate in whites. The incidence of @entity957 in black @entity1 and @entity1 increased by approximately 30% between 1973 and 1982, and the rate of @entity420 among white @entity1 increased 74%. Nearly half of the @entity957 occurred in the middle of the esophagus, whereas the majority (79%) of the @entity420 arose in the lower third. These data suggest that the two major histologic types of @entity418 may be of different etiologic origin.
