title: A 54-year-old man with a history of heartburn and progressive dysphagia.
authors: Division of Gastroenterology, Hospital of the University of Pennsylvania, Philadelphia, USA.
authors: David A
authors: DA
authors: Katzka
mesh_terms: D003680:Deglutition Disorders / Q000209:etiology*; D004931:Esophageal Achalasia / Q000150:complications* / Q000175:diagnosis*; D006356:Heartburn / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged