title: Diffuse esophageal spasm: transforming into achalasia.
authors.affiliation: Department of Gastroenterology, Shaikh Zayed Postgraduate Medical Institute, Lahore.
authors.forename: S W
authors.initials: SW
authors.lastname: Shah
authors.forename: A A
authors.initials: AA
authors.lastname: Khan
authors.forename: A
authors.initials: A
authors.lastname: Alam
authors.forename: A K
authors.initials: AK
authors.lastname: Butt
authors.forename: F
authors.initials: F
authors.lastname: Shafqat
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D004931:Esophageal Achalasia / Q000175:diagnosis / Q000209:etiology*; D015155:Esophageal Spasm, Diffuse / Q000150:complications* / Q000175:diagnosis; D004945:Esophagoscopy; D006801:Humans; D008297:Male; D008365:Manometry; D010154:Pakistan