I was diagnosed with Stage 1A uterine cancer 2.5 yrs ago at the ripe old age of 33. I had a TAH (ovaries, cervix and uterus removed) with no further treatment. I go every six months for a pap and they do a CA125 blood test.
My only suggestion is to have your mothers doc do the CA125 blood test if they are not doing so already.
Good luck
Tracy