Molecular and Epidemiological Risk Factors in the Development of Gastric Cancer

Molecular testing on formalin fixed paraffin-embedded (FFPE) tissues on retrospectively identified patients with gastric adenocarcinoma.

Germline testing will be done on prospectively identified patients and in retrospectively identified patients who are still alive.

Survey will be administered on prospectively identified patients and in retrospectively identified patients who are still alive. Survey will be administered in person or via telephone. The survey in the language of the participants choice (English or Spanish) on sociodemographic information, current and/or prior PPI (proton pump inhibitor), H2 blocker, antibiotic, tobacco, alcohol, and recreational drug use. Questionnaire will include other risk factors for gastric adenocarcinoma such as certain dietary constituents (high salt diet, high consumption of processed meat, etc.) and occupational exposures.