An adenoma is a type of benign tumor that originates from glandular tissue. These tumors can develop in various organs, such as the thyroid, pituitary gland, or colon. Although adenomas are not cancerous, they can sometimes grow large enough to cause problems or lead to more serious conditions if left untreated. Adenomas can vary in size and may not always show symptoms. In some cases, they can produce hormones, leading to hormonal imbalances. Regular check-ups and screenings are important for early detection, especially for those at higher risk, as some adenomas can progress to carcinomas, which are malignant tumors.