In reply to richard kirby:
I was diagnosed last year with a SLAP lesion, I saw a Mr Leonard Funk privately and was then referred onto the NHS, I had an MR arthrogram which did not show up the SLAP lesion. I ended up having the operation, upon waking up I was told that I had in fact torn my supaspinatus (rotator cuff) and they had pinned it back into place. I have since had a 99.9% recovery.
I was told by a number of specialists that a SLAP lesion (as well as rotator cuff tears) will not self heal. climbers tend to work through pain and find other ways of mobilising their shoulders.
Leonard Funk has a very good website www.shoulderdoc.co.uk, it explains in detail, injury issues and shows photos of gruesome looking operations.
If you have an operation you will have to take about 3 months off climbing - this might seem bad now but believe me it is better in the long run - I speak from experience of other injuries I have ignored
Good luck with your decision making.
Chris