I think you would had to have had your husband's tumor tested at the time of his surgery to see if he has Lynch Syndrome, that would be the best way to find out. If they didn't do that at the time of his surgery, you could see if the pathology dept has a specimen they could send for testing now.
This is one of the "symptoms" of Lynch Syndrome: Multiple relatives with any HNPCC-associated tumor, including colorectal cancer. Other HNPCC-associated tumors are those affecting the endometrium, ovaries, stomach, small intestine, kidney, brain or pancreas and sebaceous tumors of the skin.
So it sounds like the family history be be suspect for Lynch Syndrome!
Mom to 28 yo daughter
colectomy 2/22/10, stage 3C, signet cell
7/2011 peritoneal mets
HIPEC September 2012, difficult recovery
Hospice 10/31/2012, Died 11/16/2012