Some other acid related disorders are GERD, heartburn, acid reflux, Crohn’s, diverticulitis, IBD, IBS and celiac disease, to name a few. All these diseases have one thing in common: acid. Acid, in excess, can corrode anything… even steel. Certainly, in excess, it can corrode the mucosal lining (the colon's protective armor). Inflammation in the colon may lead to infection (attacks and flare-ups). It may also thin the colon lining allowing colitis to form. Some medical studies agree that digestive conditions are related to stomach acid.
This is why some of these diseases are even named after their acidic origins, such as heart burn and acid reflux. Again, if you want proof from the medical community, here are two Internet sources that document the fact that GERD and other stomach disorders are related to stomach acid: