Numb and confused...and terrified for my husband and myself...

A little background.. I was diagnosed with breast cancer very young 1 month after marrying my husband. Recently he was experiencing severe diarrhea, weight loss, lack of appetite and eventually turned yellow.  While waiting for a CT scan he got very ill and was rushed to emergency and given a CT scan.  Turned out he had a bleeding ulcer.  During this CT scan they also discovered blocked bile duct, and mass in large bowel. So we got through the ulcer issue, then an ERCP to remove what all the doctors said were “stones” .  Well apparently they aren’t stones.  There is some cells in bile duct that is concerning surgeon. He says that from what he sees this is 100% treatable and that if not for ending up hospitalized for ulcer this may have not been discovered for months until he could get in as an outpatient for CT scan and ERCP. So I need help.  I’ve read about this get rare cancer but the pathology report would not say it was cancer so I don’t know what’s going on. Surgeon said if he operates and it’s precancerous then that’s bonus.  Has anyone had any experience with this type of diagnosis? 
any stories or encouragement would be so wonderful 
thank you