how can progress in cryonics, cloning, and gerontology be used to
rejuvenate and extend lifespan of 90 years old terminal cancer
patient?

'Progress' is continually evolving and it is impossible to predict
what might come along in the future that will help in specific cases.

All any of us can do is hope and (if you are religious) pray.

Good Luck with your investigations.

Bryan

The cryonics community (and industry) is one of the oldest and most
established modern scientific life extension movements. Many people of
note in the wider community have some ties to it, and cryonicists can
take some credit for driving the modern interest in developing
nanomedicine based on molecular nanotechnology.
http://www.beauty-cosmetic-guide.com/anti-aging.htm

There are lots of scams making empty promises. Likely one in a
thousand of them have something that will help significantly. I have
no idea how to identify the rare useful ideas.   Neil

90 years old is a very old age indeed.

At that age one has hopefully lived a full life. At that age, one will
have seen many of his/her friends and family pass away.

Everyone dies. It's part of life.

Age is a matter of mind. If don't mind it does not matter. In fact,
the whole chemistry of human body is controlled by the MIND. You may
compare it with software in Computer system. If mind is filled with
positive thoughts (truly - not superficial), you can even reverse the
process of aging. You can control any physical damage too. But you
must have faith in this concept. If you don't have faith, no use. You
should be crazy for what you are expecting. Your action, tongue and
mind should replicate the same thing. You can not cheat your body by
artificial thoughts. It should be natural - very natural.

It can be achived but not hapazardly. Keep on practicing. Restructure
the way you think. The way programs(deep faith) are affceting your
body. If you have deep faith in negative world, it will generate
negative effects only.

Words are not sufficient to elaborate the process. You can understand
it personnaly. IT IS truth.