QUESTION: My dad has been diagnosed with Stage 4 colon cancer.Below are the deatils:1) The doctors are unable to operate the primary tumor due to its proximity to the uretar and also its size.2) A bypass has been done in the colon for easy passing of stools.3) The cancer has been seen in his liver and traces in his stomach too.4) My father starts his first round of chemo this week.Medical brief: ( this is what report says)1)liver - normal attinuation 7.8 * 6 62) Mass segment in 1 4 and 7.3) calcification lesion fine varigated post contratct enhancement cyst in seg 44)peripephatic peritonial nodals 5)9.2 cm irregulr descending colon
6)multiple enlarged lymphnods
7) walll thciekene decsending and sigmoid colon ( suv) max 10.3 gm/ml
8) pericolic lymhnods ( SUV max 7.6 gm/ml
9) Nodules on the serfuce of liver 4.4 gm
10)Liver mass Suv 13.34

General health of my father : 1) he is 65 years old
2) Fit overall with no problem in other organs of the body. He has been regularly exercising till the day of diagnosis.
3) He is mentally strong and determined to fight it out.

I want to know what course of treament should i follow. Would chemo be nefecial for him?
Are there chances of him recovering??

I know you cant guarantee anything in this case , yet an answer would help me.

1) Assuming chemo works to his benefit and the primary tumor shrinks and is operated, then what could his life expectancy be?
2) After chemo, if the cancer cells in liver and stomach reduce, but primary tumor is still inoperable, then what could the life expectancy be?
3) And lastly, if chemo is a disaster, then what could his life expectancy be?