Study: NCT04600466

Intervention type: OTHER
Intervention: Molecular testing for all participants.
Description: Molecular testing on formalin fixed paraffin-embedded (FFPE) tissues on retrospectively identified patients with gastric adenocarcinoma.

Intervention type: OTHER
Intervention: Molecular testing for all participants.
Description: Molecular testing on formalin fixed paraffin-embedded (FFPE) tissues on retrospectively identified patients with gastric adenocarcinoma.

Intervention type: OTHER
Intervention: Germline Testing
Description: Germline testing will be done on prospectively identified patients and in retrospectively identified patients who are still alive.

Intervention type: OTHER
Intervention: Germline Testing
Description: Germline testing will be done on prospectively identified patients and in retrospectively identified patients who are still alive.

Intervention type: OTHER
Intervention: Germline Testing
Description: Germline testing will be done on prospectively identified patients and in retrospectively identified patients who are still alive.

Intervention type: OTHER
Intervention: Germline Testing
Description: Germline testing will be done on prospectively identified patients and in retrospectively identified patients who are still alive.

Intervention type: OTHER
Intervention: Survey
Description: 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.

Intervention type: OTHER
Intervention: Survey
Description: 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.

Intervention type: OTHER
Intervention: Survey
Description: 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.

Intervention type: OTHER
Intervention: Survey
Description: 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.