An adenoma is a type of benign tumor that develops in glandular tissues, such as the colon, thyroid, pituitary gland, or adrenal gland. These tumors are typically slow-growing and non-cancerous, but they have the potential to become malignant over time. Adenomas are often discovered incidentally during medical imaging or screening tests and can cause various symptoms depending on their location and size. Treatment options for adenomas may include monitoring, medication, or surgical removal, depending on the individual case. Adenomas are commonly studied in the field of oncology and endocrinology to better understand their development, progression, and potential treatments.