Hi, I only know it's best to remove the thymus as soon as possible, to have the best effect.
But how about over 6 years after you're diagnosed? Can it still help, or won't it make any difference?

It's for my friend: she is young and has a normal thymus gland. She is diagnosed in 2008, and had her first symptoms in 2007. She has been on prednisone and mestinon since 2008, nothing else.
She's afraid she missed her chance at less symptomes because she never had the recommended operation in her first years.