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What are adenomas?

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Adenomas are benign tumors starting in the epithelial tissue of a gland or gland-like structure. The epithelial tissue is the thin layer of tissue covering organs, glands, and other structures. A common type of adenoma is a polyp in the colon. Adenomas might also grow in the liver or the adrenal, pituitary, or thyroid gland.

If needed, adenomas can often be removed with surgery. Although not common, this type of tumor can become malignant. In the colon, less than 1 out of every 10 adenomas become cancerous.

From: Benign Tumors WebMD Medical Reference

SOURCES: Brigham and Women's Hospital: "Facts about Meningiomas." Cleveland Clinic: "Benign Soft Tissue Tumors." American Cancer Society: "Salivary Gland Cancer." UCSF Medical Center: "Fibroids." American Cancer Society: "What is a soft tissue sarcoma?" Children's Hospital Boston: "Hemangioma." American Academy of Family Physicians: "Lipomas." American Brain Tumor Association: "Meningioma." National Cancer Institute: "What You Need to Know About Moles and Dysplastic Nevi." American Academy of Orthopaedic Surgeons: "Osteochondroma (Bone Tumor)." Cleveland Clinic: "Benign Bone Tumors." eMedicine: "Papilloma, Conjunctival: Treatment & Medication."











Reviewed by William Blahd on July 11, 2017

SOURCES: Brigham and Women's Hospital: "Facts about Meningiomas." Cleveland Clinic: "Benign Soft Tissue Tumors." American Cancer Society: "Salivary Gland Cancer." UCSF Medical Center: "Fibroids." American Cancer Society: "What is a soft tissue sarcoma?" Children's Hospital Boston: "Hemangioma." American Academy of Family Physicians: "Lipomas." American Brain Tumor Association: "Meningioma." National Cancer Institute: "What You Need to Know About Moles and Dysplastic Nevi." American Academy of Orthopaedic Surgeons: "Osteochondroma (Bone Tumor)." Cleveland Clinic: "Benign Bone Tumors." eMedicine: "Papilloma, Conjunctival: Treatment & Medication."











Reviewed by William Blahd on July 11, 2017

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