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ERBB2 is overexpressed in 15-25% of upper gastrointestinal adenocarcinomas. We use a stable lentiviral shRNA model to demonstrate that ERBB2 suppression in upper gastrointestinal adenocarcinomas with documented ERBB2 amplification effectively decreases ERBB2 protein levels and decreases cell viability. Further, we evaluate tumor growth of cells treated with the ERBB2 shRNA.