I have a family history of pancreatic, stomach and colon cancer. is there a link to these cancers?

R/o Lynch's: All of these are common, and there's no classic syndrome in which they tend to run together other than lynch's for which you may get checked. Lifraumeni and related cancer-family syndromes feature patients presenting at early ages or with unusual tumors. Familial pancreatic cancer usually features pancreatitis as well, and familial colon cancer usually features multiple polyps.

Hereditary cancer: Whether or not these are linked by a hereditary syndrome called lynch syndrome is dependent upon whom in your family had them. See your doctor to discuss testing for lynch syndrome (hnpcc).