#birthmark__nevus  a blemish on the skin formed before birth
  supertype:  #blemish  a mark or flaw that spoils the appearance of something (especially on a person's body); "a facial blemish"
  subtype:  #port-wine_stain__nevus_flammeus  a flat birthmark varying from pink to purple
  subtype:  #strawberry_mark__strawberry__hemangioma_simplex  a soft red birthmark

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