A 38-year-old man comes to the physician for a 2-month history of diminished ability to swallow solids and liquids. Physical examination shows halitosis. There is no edentulism. A barium swallow is shown. He is a non-smoker. He drinks 1-2 beers on weekends. Which of the following is the next best step in management?
24-hour pH monitoring
Esophagogastroduodenoscopy
Insertion of nasogastric tube
Manometry
Surgical consultation
