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- Dictionaryul·cer/ˈəlsər/
noun
- 1. an open sore on an external or internal surface of the body, caused by a break in the skin or mucous membrane that fails to heal.
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noun
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An ulcer is a discontinuity or break in a bodily membrane that impedes normal function of the affected organ. According to Robbins's pathology, "ulcer is the breach of the continuity of skin, epithelium or mucous membrane caused by sloughing out of inflamed necrotic tissue." Common forms of ulcers recognized in medicine include: Ulcer (dermatology), a discontinuity of the skin or a break in the sk... Wikipedia