I know the Mayo clinic has a wonderful
reputation, but perhaps you could convince
her to get a second opinion with a hospital
that only deals with cancer, i.e. Sloan
Kettering, New York. You will need the slides
from the Mayo pathology department (you pay for that, but they
have to give it to you) and, well, go to the
hospital site and they will tell what you
will need. She could get an appointment and
see a doctor in person. The negative side
would be that it's expensive. But I urge
you to consider this option.