It’s one or the other, you can’t have both. My son has Crohn’s and I have UC, the difference is that UC effects your colon only and Crohn’s effects the small and large intestines but, they didn’t have the technology back when your husband was diagnosed with UC to determine or classify the true symptoms because you couldn’t at that time go into your small intestines nor do I think you could even now. I had to swallow a little camera that took hundreds of pictures of my whole digestive system and to definitively say that after reviewing pics my small intestines were without any ulserations but my colon was mangled as well my rectum. Also, having Crohn’s doesn’t nessassaraly mean it just attacks the small intestines, it at most times attacks the colon so, it would have been hard to determine what specific disease he had, he may have had Crohn’s all along! Did they do a with barium x-ray to see if there is a blockage? Good luck and I hope he get better soon!.