I have and had a colon resection after several episodes with it which was 15 years ago. I have not had a recurrence since. I still have had diverticulitis on several occassions even though the thinking was that they had cut out the area of my colon that was affected. I have been told by a couple of medical people that this Ischaemic colitis is akin to a heart attack of the colon.
Please accect my sincere sorrow for the loss of your mother.