'Sigmoid' esophagus on Ba Swallow is seen in: (A) Achalasia cardia, (B) Scleroderma, (C) Diffuse esophageal spasm, (D) Carcinoma esophagus
Answer is A. Esophageal motility disorders like diffuse esophageal spasm, presbyesophagus and nutcracker esophagus may show "cork screw" apperance.