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?
Dysphagia equal for both solids and liquids from the very onset of disease suggests motor disorder like 
Achalasia
Diffuse esophageal spasm
Dysphagia more for solids than liquids implies mechanical obstruction
Ca esophagus
Strictures
Webs
Note that dysphagia in achalasia cardia is slowly progressive. But 'nonprogressive' dysphagia in this pt. does not rule out the diagnosis of achalasia
Caricnoma of the esophagus
Lower oesophageal mucosal ring
Achalasia cardia
Reflux esophagitis with esophageal stricture