Definition of ulcer - NCI Dictionary of Cancer Terms

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ulcer (UHL-ser)

A break on the skin, in the lining of an organ, or on the surface of a tissue. An ulcer forms when the surface cells become inflamed, die, and are shed. Ulcers may be linked to cancer and other diseases.

Previous Definitions:	ubiquinone, UCN-01, UFT, Uftoral, UGT1A1
Next Definitions:	ulceration, ulcerative colitis, Ulmus fulva, Ulmus rubra, ultrasonogram