Anorexics have bone fractures.
Terri wasn't anorexic.
First, Terri wasn't anorexic. At ~125 pounds at 5'4" she was still above her ideal weight.
Second, I have never heard of a bulimic who got similar health problems as Terri. They suffer a different range of problems, such as severe acid reflux and gradual wearing down of the esophagus. They're not skinny either. Name one bulimic who fell into a coma... anyone.
Third, even stress fractures HURT. There's no way Terri's daily life wouldn't be impaired. Especially with those rib fractures... you're constantly irritating it by breathing so you're hurting it constantly.
Finally, here's the medical definition of trauma.
"A serious bodily injury or shock, as from violence or an accident."
Does that sound like simple stress fractures to you?