BACKGROUND
Although the incidence of gastric cancer has been decreasing, recent reports suggest an increased rate in select populations. We sought to evaluate trends in gastric cancer incidence to identify high risk populations.
METHODS
Gastric cancer incidence rates from 1992 to 2011 were computed using the Surveillance, Epidemiology and End Results (SEER) registry. We evaluated trends in incidence rates by calculating annual percent change (APC) across 3 age groups (20–49, 50–64, ≥65) and 4 racial/ethnic groups (Hispanics, non-Hispanic Whites, Blacks, and Asian/Pacific Islanders).
RESULTS
We identified 41,428 patients with gastric cancer. For the entire cohort over the study period, the APC was decreased. When patients were grouped according to sex, APC was flat or decreased in women regardless of age or race/ethnicity. APC was also flat or decreased for all men except young Hispanic males (20–49 years), who had an increased APC of nearly 1.6% per year (1.55%, 95% CI:0.26 to 2.86%). Furthermore, young Hispanic males were the only group to have increased incidence of Stage 4 disease (APC 4.34%, 95% CI:2.76 to 5.94%) and poorly differentiated tumors (APC 2.08%, 95% CI:0.48 to 3.70%).
CONCLUSIONS
The APC of young Hispanic male gastric cancer places it among the top cancers with rising incidence in the United States. This is concomitant with increased incidence of advanced disease at presentation. This major public health concern warrants additional research to determine the etiology of the increasing incidence in this group.