@luminescentowl & @wolfwhistler
The author actually uses a made up illness 폭식 결여증 not bulimia (폭식증/대식증).
Since it is a made up illness, the translators probably used something that they thought would be most understandable.
If you break down 폭식 결여증, 폭식 is binge eating and 결어증 is aplasia, which...