Fight like a girl:
My GI at the time of all of my testing, who was a protege of Dr. Shen that took a job at Yale and has since moved on to NYC, essentially said the thing as Dr. Shen. He went back and forth and back and forth on whether it was Crohn's or not. I think that for him, it was really an academic challenge more than anything else, but when the diagnostic testing costing tens of thousands of dollars and which didn't need to spent came back inconclusive, he threw his hands up in the air and said let's just treat it because regardless of what it is, it has to be treated. He was of the opinion that the pattern of inflammation above the Pouch was not totally explained by and consistent with backsplash stool, although he also believed the backsplash was a significant factor in the inflammation in the neoterminal ileum. The final diagnosis was "likely Crohn's, but doesn't matter because the meds I will give you for it are the same meds I would give you for it if we called it something else."
So it's really "indeterminate IBD" but for insurance reasons it's arbitrarily labeled as Crohn's. Which I find immensely stupid but it is what it is.