if your levels are normal it's possible it was a past irregularity that started it up. as long as they look like they'll stay stable in future the doc may be willing to operate. it's a risk though, you'd be rid of it sooner but in the pub range you'd still have some risk it could come back. if the doc feels confident and would be willing to re-op if it came back in a year or two, that'd be one thing, otherwise it could be worth the wait.