I would strongly recommend that anyone with colitis or Chron's get tested for celiac disease.

"It is not uncommon to get different kinds of colitis with celiac disease.The most common association is with microscopic colitis or lymphocytic colitis. " "Since Chron's can cause villous atrophy in the small intestine, it can mask or confuse the diagnosis...... celiac disease and Chron's disease can coexist - thus complicating the diagnosis."
Celiac Disease: A Hidden Epidemic
by Peter H. Green, Rory Jones, Rory Jones