How can we save a lilac that has fungus growing on it?

Question: We have a dark purple lilac that had this fungus show up this spring on it, or at least that’s when we noticed it. It is well blossoming, plenty of leaves, etc. I am afraid this may be a death sentence for it but have learned not to necessarily rely on the internet. If read more How can we save a lilac that has fungus growing on it?