Ulcer

Pronunciation

Definition 1

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. (NCI Dictionary)

Definition 2

A circumscribed inflammatory and often suppurating lesion on the skin or an internal mucous surface resulting in necrosis of tissue. (NCI Thesaurus)

Definition 3

A lesion on the surface of the skin or a mucous surface, produced by the sloughing of inflammatory necrotic tissue. (NLM, Medical Subject Headings)

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