I am really sorry to read of your friend's predicament. I was also surprised to read that a colon cancer growth has been identified after only 9 months prior to which a clear colonoscopy test was achieved. I think that you should probe this further.
Surgery is also a possible treatment for colon cancer and this is supposed to be effective as long as the cancer has not spread. I underwent a total colectomy almost five years ago - not for colon cancer - but for torrential diverticular bleeding. I described it to another Medhelp patient who was interested. Log on to:-
I think that you should ask your specialist whether surgery is an option.
The whole tenor of your posting and the replies given by others leaves in my mind a suspicion that the correct diagnosis may not have been reached so far and I would also agree with the suggestion to seek a second opinion. Are you satisfied with the expertise of the hospital that your friend has visited. If not, then do seek "the best" even if it means travelling to ??Auckland??/OZ/or even the Mayo Clinic in the USA?? I don't know exactly where Huntly is in NZ - of course the medical facilities may be second to none - but, if not, then do search more widely.