That is a polyp. They are benign growths within the colon, however some can be pre-cancerous. For this reason polyps are usually removed. It's done through the colonoscope and is somewhat similar to the biopsies they do during a c-scope. There may be some cramping and bleeding afterward, but it's usually minor.
Please let your breath out and try to relax. First, the vast majority of polyps are completely harmless. Second, they are usually easily removed. Third, if you have a pre-cancerous lesion you can have it removed in ample time to prevent the development of colon cancer. This is one of the only benefits of UC - we get regular scopes so if we do develop pre-cancerous lesions they can be removed before they become a big problem.
Moderate to severe left-sided UC diagnosed 2001.
Flared for 5 years, finally in remission with Remicade since March 2006.
Avascular necrosis in both shoulders is my "forever" gift from steroids.
Colazal, Remicade, Nature's Way Primadophilus Reuteri.
"My life is an ongoing medical adventure"