[Verified Answer]: An 80-year-old female is brought to her…

An 80-year-old female is brought to her primary care physician by her daughter because she has lost 20 lbs. and cannot keep food down. During the past several months the patient has had trouble swallowing both solid and liquid foods. She frequently regurgitates undigested food both during the day and while sleeping. The patient describes a feeling of “fullness” and discomfort in her chest.