Review Question - QID 108691

A 54-year-old man tells his physician that he has had trouble swallowing for the past few months, and it has gotten much worse. He states it is difficult to swallow both liquids and solids. Sometimes at night he regurgitates bits of food. He has tried to overcome the difficulty by eating more slowly and has tried antacids with no relief. This problem has emerged recently, and he has no other complaints. A barium swallow is done for the patient (Figure A).

Which of the following is associated with this condition?