Benign tumors of glandular tissue or mucosa are called adenomas. In principle, adenomas can occur in all organs.

The best known are the adenomas of the intestinal wall, known as “polyps”. These can lead to blood in the stool and are considered precancerous. This means that even if adenomas are initially benign, there is a risk that they may mutate into malignant tumors. Therefore, intestinal polyps should be removed early using minimally invasive methods. Chronic inflammatory bowel diseases, especially ulcerative colitis and Crohn’s disease, increase the risk of developing colorectal cancer.