#ulcer__ulceration  a circumscribed inflammatory and often suppurating lesion on the skin or an internal mucous surface resulting in necrosis of tissue
  supertype:  #lesion  any visible abnormal structural change in a bodily part
  subtype:  #aphthous_ulcer  a blister on the mucous membranes of the lips or mouth or gastrointestinal tract
  subtype:  #bedsore__pressure_sore__decubitus_ulcer__decubitusulcer  a chronic ulcer of the skin caused by prolonged pressure on it (as in bedridden patients)
  subtype:  #chancroid  infectious venereal ulcer
  subtype:  #peptic_ulcer__peptic_ulceration  an ulcer of the mucous membrane lining of the alimentary tract
     subtype:  #duodenal_ulcer  a peptic ulcer of the duodenum
     subtype:  #gastric_ulcer__gastriculcer  a peptic ulcer of the stomach
  subtype:  #canker  an ulceration (especially of the lips or living of the mouth)
  subtype:  #noli-me-tangere  a cancerous ulcer of soft tissue and bone
  subtype:  #noma  acute ulceration of the mucous membranes of the mouth or genitals; often seen in undernourished children

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