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 Indian J Med Microbiol  
 

Figure 4 (A-C): (A) Primary achlasia: Prone single-contrast barium swallow showing dilated esophagus with tapered beak-like narrowing at GE junction (arrow). On fluoroscopy, primary peristalsis in esophagus was absent. (B) Dilated and tortuous esophagus in a case of primary achlasia (C) Secondary achlasia: Prone RAO view showing mildly dilated esophagus with narrowing involving lower thoracic esophagus and GE junction, with mucosal irregularity (arrow). Note greater length of narrowed segment and less dilatation of esophagus in comparison to (A)

Figure 4 (A-C): (A) Primary achlasia: Prone single-contrast barium swallow showing dilated esophagus with tapered beak-like narrowing at GE junction (arrow). On fluoroscopy, primary peristalsis in esophagus was absent. (B) Dilated and tortuous esophagus in a case of primary achlasia (C) Secondary achlasia: Prone RAO view showing mildly dilated esophagus with narrowing involving lower thoracic esophagus and GE junction, with mucosal irregularity (arrow). Note greater length of narrowed segment and less dilatation of esophagus in comparison to (A)