Yes they definitely can occur in the colon as well. Many people on here have had resections in the colon.
My only previous symptom was occasionally vomitting with a bowel movement.
57 yr. old F dx. CD 07/07
Was on prednisone for three months but no medication for next 11 months.
Started weekly methotrexate injections 09/22/08.
Lap assisted sigmoidoscopy done May 11/2009