Posted: 18/09/2014 at 13:37
I thought at first it was robins gall, caused by a wasp. However I think it looks more like weedkiller damage. Have you mulched with stable manure?
some of it is contaminated with a weed killer that causes these distortions.
If it is either of these two, it is temporary and you do not need to dig up the rose.
Prune out all affected parts and burn, next year the rose is likely to be OK. Use a rose feed in Spring.