adenoma

An adenoma is a benign tumor originating from glandular structures. A tumor is an abnormal mass of tissue that can be benign or malignant. Tumors are named based on their origin and microscopic appearance. For instance, an osteoma is a benign tumor derived from bone cells. Epithelial cells, which line surfaces and organs, can form various benign tumors. An adenoma is a type of benign epithelial tumor that arises in endocrine glands or forms a glandular structure. Carcinomas, on the other hand, are cancerous growths of epithelial tissues that can invade surrounding areas and metastasize. Most pituitary tumors are benign and are classified as adenomas.12345