How would bulimia affect a tummy tuck?

How will bulimia will affect an abdominoplasty with lipo. I am close to total recovery but purge occasionally (maybe once a week). I should have told this to the surgeon before i scheduled the surgery, but now I KNOW i must provide full disclosure in order to fully care for myself. What should i say? I've been in extension therapy for 6 years and have discussed this surgery at length with my therapist. All of my blood tests from my primary care physician have come back normal per electrolytes etc.