I asked our labs pathologist to look at my crohn's slides with me today. She was very happy to and she showed me all manner of things. What I found most interesting was the thickening of the muscle wall. She showed me a normal section then a crohn's section. There was quite a difference. I was also shown ulcers, where there is no epithelial layer to hold blood back thus the bleeding. What amazed me the most was how narrow the intestine had become...I am surprised anything got through.