Theresa is a normal weight for a girl her age and height, but she is obsessed with the idea that she is too fat. She often goes without eating all day, and then in the middle of the night sneaks into the kitchen and eats everything she can find. A typical binge might include an entire roasted chicken with mashed potatoes and gravy, some bread, and a half gallon of ice cream. Afterward, she always goes to the bathroom to throw up the food. Theresa most likely would be diagnosed with .