@yash - First things first, do you know where your small bowel inflammation is located? Backwash ileitis only affects the terminal ileum (last few inches of the small bowel); it's caused by the 'backwash' of contents from the caecum. If you don't have UC in your caecum, then it's probably not that.
Here's a guide to non-Crohn's causes of terminal ileum inflammation. Note that some of the causes will be extremely rare, including the cancerous ones. Also note that in a study of nearly 4000 people, 125 had visible changes in the TI, but for 91% of those 125 people, it was idiopathic (i.e. no cause could be found) and seemingly harmless. For the remaining 8%, most had Crohn's disease.
www.annalsgastro.gr/index.php/annalsgastro/article/view/1004/742Long story short, if you have non-idiopathic small bowel inflammation, the most likely cause is Crohn's. End of the day, though, I'm not a pathologist and even if I was, I don't have access to your medical records. This is a conversation you need to be having with your doctors.
Also, there are various causes of B12 deficiency. Crohn's is one cause, but there are others; I dunno what's caused your B12 deficiency. Holding off on the iron supplements because of possible constipation seems a little bit weird; however, you can wait and see if you want.
Edit: I knew idiopathic small bowel inflammation existed, but not to that extent; still a bit surprised by that study's findings. I'm finding the concept of insignificant inflammation a bit hard to digest as it were. But Crohn's does do a lot of damage to the intestines; that definitely is not harmelss.
Post Edited (NiceCupOfTea) : 5/10/2014 11:05:07 AM (GMT-6)