It has happened in the past, it
is strange that he changed the diagnosis. Prednisone and
Asacol and staple drugs in both Crohn's and colitis, and if you were put on them it makes sense that the doc saw inflammation when you were tested and diagnosed it as Crohn's. It could be that the medications were working and upon further testing the inflammation was reduced to the extent that the doctor felt the initial diagnosis was wrong, when in fact you were going into remission.