I’m sorry as well. My mother died from the treatment for colon/rectal cancer.
My mother had it too. Treatment for her was worse than the disease. 3 weeks of it flattened her. Stroke, neutropenia, blockage..just awful. Took her a month just to get out of the hospital and another two in rehab. She never touched chemo again. She made it another 3 years, 2 of which she had a fairly decent quality of life. I miss her dearly.
My sympathies to him and his family.
My mother also died from colo-rectal cancer.