You might want to seek a second opinion. I have never heard of Crohn's being diagnosed by just "looking". How does he know it's not ulcerative colitis, the other inflammatory bowel disease? If you have UC you could opt for a j-pouch or a Kock or BCIR pouch. I think you might want to see a GI who is experienced in IBD and get a firm diagnosis before resorting to surgery. I had severe rectal disease, mine was UC.
dx proctitis in 1987
dx UC in 1991, was stable until 1998
1998 started prednisone, asacol, pentasa, nortriptylene, ativan, 6MP, rowasa enemas and suppositories, hydrocortisone enemas, tried the SCD diet, being a vegetarian, omega 3s, flax, pranic healing, yoga, acupuncture, probiotics
2000 lost all my B-12 stores and became anemic
2001 opted for j-pouch surgery- now living life med-free