User blog comment:Miskos3/Fairy Tail Chapter 490: Fairy Tail Zerø, Review/@comment-1359322-20160620115832/@comment-7418318-20160620214818

The only context in which Porly mentioned surgery was telling that neither she nor anyone else on the continent is "capable of that feat".

I doubt shrinking the tumor would make it any easier to perform such a surgers. Probably the contrary.