<prompt> A 40-year-old female patient presented with dysphagia to both liquids and solids and regurgitation for 3 months. The dysphagia was non-progressive. What is the most likely diagnosis?Caricnoma of the esophagusLower oesophageal mucosal ringAchalasia cardiaReflux esophagitis with esophageal stricture  <response>: Dysphagia equal for both solids and liquids from the very onset of disease suggests motor disorder like AchalasiaDiffuse esophageal spasmDysphagia more for solids than liquids implies mechanical obstructionCa esophagusStricturesWebsNote that dysphagia in achalasia cardia is slowly progressive. But nonprogressive dysphagia in this pt. does not rule out the diagnosis of achalasia 