Surveillance Endoscopy in the Management of Hereditary Diffuse Gastric Cancer Syndrome.

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Hereditary diffuse gastric cancer (HDGC) syndrome results from a germline CDH1 mutation, and microscopic foci of signet-ring carcinoma cells (SRCC) are present in nearly all gastrectomy specimens.1 The lifetime risk of invasive gastric cancer (GC) has been thought to be 70%,2 but recent data have suggested a lower risk of 37%.3 Prophylactic total gastrectomy is considered the standard of care, but many patients choose surveillance endoscopy instead. We sought to define the outcomes in CDH1-positive individuals who pursued endoscopic surveillance.

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