The link between GERD and lung cancer seems plausible based on the following facts: (1) Lung adenocarcinoma has a growing incidence with a trend to surpass squamous cell carcinoma[33,34], similar to esophageal cancer; (2) Lung adenocarcinoma is the most frequent histologic type in non-smokers and a clear risk factor has not been attributed to it[35]; (3) Connective tissue diseases are common risk factors for lung adenocarcinoma[36] and GERD[37]; and (4) Centrally located lung adenocarcinoma (area of the lung closer to the esophagus and more prone to aspirate gastrodudodenal refluxate) is likely to arise from the glandular epithelium (superficial layer more susceptible to contact with refluxate). In contrast, peripheral adenocarcinoma is likely to originate in type II pneumocytes and Clara cells[38].