Lipoma recurrence after multiple removals, what can I do about it now?

I have a non-encased lipoma/fatty mass on the back of my neck (over C7, but diffuse). I'd had it for as long as I could remember; it was surgically excised in January 2016, but it grew back as a more acute, less diffuse mass that seemed to push on my nerves and cause neck pain/headaches. Excised again by the same surgeon -- an awesome, lauded Cornell doc -- in December 2016 and now, in April 2017, it's grown back and is again causing neck pain/headaches. What now? It's painful and ugly!