Most often, adenomas are treated by removing them during a colonoscopy, explains American Cancer Society. If an adenoma is too large to remove during a colonoscopy, surgery may be required. Normally, an additional colonoscopy is scheduled to monitor an individual for further adenoma growth.
An adenoma is a polyp that closely resembles the tissues in the colon, and tubular simply means the adenoma is tube-like in shape, explains American Cancer Society. In some cases, an adenoma or polyp that is not removed can turn into cancer over time. However, polyps are considered noncancerous or benign growths. Tubular adenomas are the most common type of colon polyp, and most of these polyps are fairly small. Larger adenomas that have a villous, rather than tubular growth pattern, are more likely to have cancer growing in them.
Adenoma descriptions may also include the term dysplasia, according to American Cancer Society. This term is used to describe how much the tissue of an adenoma resembles cancer. Mild to moderate, or low-grade dysplasia means that the tissue is only mildly abnormal. High-grade or severe dysplasia indicates the tissue more closely resembles cancer. Sessile serrated adenomas, traditional serrated adenomas and adenomatous polyps are pre-cancerous. While these types of polyps do increase a person's risk for cancer, most people who have these types of polyps do not develop cancer.