There is no strong evidence that having a close relative with esophageal adenocarcinoma significantly increases your risk of developing esophageal adenocarcinoma. There are at least four recent studies looking at relatives of patients who developed esophageal adenocarcinoma. Three of these studies reported that having a close relative with esophageal adenocarcinoma did not increase the risk of developing esophageal adenocarcinoma. The fourth study reported that patients who had Barrett's esophagus or esophageal adenocarcinoma were more likely to have a relative with Barrett's esophagus or esophageal adenocarcinoma compared to patients who had GERD but no Barrett's esophagus. However, most patients who have an esophageal adenocarcinoma do not have a known family history of esophageal adenocarcinoma. References: Brown LM, Swanson CA, Gridley G, Swanson GM, Schoenberg JB, Greenberg RS, Silverman DT, Pottern LM, Hayes RB, Schwartz AG, et al