esophageal and gastric disorders dysphagia structural dysphagia neuromuscular dysphagia Figure 3-1 Etiologies of and approach to dysphagia (NCP Gastrohep 2008;5:393; Neurogastro 2012;24:57) gastroesophageal reflux disease peptic ulcer disease gastrointestinal stromal tumor (GIST)