A 48-year-old woman had a choking episode 3 years ago while…

A 48-yeаr-оld wоmаn hаd a chоking episode 3 years ago while eating at a restaurant. Since then, she has been afraid to eat a wide range of food, fearing she will choke. This fear has caused her to no longer go out to restaurants and has contributed to significant weight loss. Which diagnosis best matches this clinical picture?