title: Primary achalasia: analysis of endoscopic ultrasonography features with different instruments.
abstract: The examination of patients with primary achlasia using classical radial endoscopic ultrasonography lacks accuracy and has yielded inconclusive results. The diameter of the scope and the presence of a balloon makes examination of a short stenotic segment difficult. These techniques, however, are useful in the evaluation of patients with suspected pseudoachalasia due to tumor infiltration.
authors.affiliation: Department of Gastro-enterology, ULB Hôpital Erasme, Free University of Brussels, Belgium.
authors.forename: J
authors.initials: J
authors.lastname: Devière
mesh_terms: D016145:Endoscopy, Digestive System / Q000295:instrumentation; D004931:Esophageal Achalasia / Q000000981:diagnostic imaging*; D006801:Humans; D014463:Ultrasonography / Q000295:instrumentation