<prompt> On barium swallow Leiomyoma shows following characteristic appearance?Rat tail appearanceCork screw appearanceOval mass lined by bariumString sign  <response>: Ans. is c i.e., Oval mass lined by bariumOn barium swallow, leiomyoma may be seen as a discrete round or ovoid submucosal mass that is well outlined by barium.Its borders form slightly obtuse angles with the esophageal wall.Esophageal leiomyoma is a benign smooth-muscle neoplasm of the oesophagus. It is the most common benign tumor of the oesophagus.They typically involve the mid-to-distal oesophagus. 