Don't despair on the ultimate fix yet.
I have a very good friend who had a really dreadful case of diverticulitis, was in the ICU on a respirator for weeks, septic, multiple surgeries, came very, very close to dying. Was ultimately released from the hospital with an ostomy. After several months, that one was replaced with another in order to take pressure off the first. Her innards were a mess. Significant amounts of intestine removed, tons of scar tissue, much damaged tissue. Only one surgeon in our area would agree to try to reverse the ostomy. It was touch and go, but she succeeded.
Your husband must be very, very disappointed, but I hope things work out for him in the long run.
F, 64 at DX CRC Stage IV
3/17/18 blockage, r hemi
11 of 25 nodes,5 mesentery nodes
5mm liver met out
pT3 pN2b pM1
BRAF wild, KRAS G12D
7/18 CT NED
11/18 CT NED
12/18 MRI 5mm liver mass, 2 lymph nodes in porta hepatis
6/19 Multiphasic CT LNs normal, Liver stable
6/28/19 Pause Key, predisone for joint pain
7/31/19 Restart Key
9/19 CT stable
Pain: many fails before Celebrex helps
12/23/19 CT stable