Thanks both!

I was always told there's this "5 year rule": do it as soon as possible, up to 5y after diagnosis.

She does have some weakness, but is able to cope. She does however starts to notice her long use of prednisone. She's on 25 mg a day for years now, can't be healthy.

You are right; there's no way to tell if the ones who got a thymectomy would gotten better without it.

Thanks Juanitad for sharing your experience; it gives her hope and helps in her decision making.