<prompt> What is the diagnosis demonstrated in the barium esophagogram?AchalasiaSchatzkis ringNut cracker esophagusCarcinoma esophagus  <response>: Barium oesophagram demonstrating advanced carcinoma with abrupt, irregular narrowing of the distal oesophagus, with more proximal dilation and an air-fluid level . ref - harrisons internal medicine 20e pg566,567 