Hello and Welcome-

Have you had some problems with this all your life, from the c rib, or did it come on slowly? Due to work, accidents or postures?

Oh and some are a large full set and some are just small and not a complete set of extra c ribs. Did you see you films or did the dr say anything about size, partial or full set?

If it's always been some sort of problem then removal might be a good idea.
If the main cause of trouble is from the extra c rib - usually the surgery for that will have a better result.
But of course only go to an expert surgeon if you do consider any surgery.
{leave surgery as a last resort- well unless you are having serious vascular compressions}

there is good PT and not so good- if they are making you do weights/arm bands while you are still in pain - it's not good.
are they focusing on gentle posture improvement & correction and pain reduction?

i hope you have time to read thru many of our other threads and our useful sticky-
http://neurotalk.psychcentral.com/thread84.html

what are your worst symptoms?