Coral Spot

AliP

I have a beautiful large Acer that has developed coral spot. I thought it only effected dead wood but it seems to be causing the dead wood? Having previously cut off the effected limbs it has now spread into one of the main trunks (the tree splits into two main trunks at the base). Am I going to have to lose this tree altogether? I'm clinging to the hope there maybe another way!! Thanks