A 79-year-old retired opera singer presents with dysphagia, which has become progressively worse during the last 5 years. He states that he is sometimes aware of a lump on the left side of his neck and that he hears gurgling sounds during swallowing. He sometimes regurgitates food during eating. What is the likely diagnosis?
Carcinoma of the esophagus Foreign body in the esophagus Plummer-Vinson (Kelly-Patteson) syndrome Zenker's (pharyngoesophageal) diverticulum