#skin_cancer  a malignant neoplasm of the skin
  supertype:  #carcinoma  any malignant tumor derived from epithelial tissue; one of the four major types of cancer
  subtype:  #cancroid__squamous_cell_carcinoma  the most common form of skin cancer
  subtype:  #epithelioma  a malignant tumor of the epithelial tissue
  subtype:  #malignant_melanoma__malignantmelanoma__melanoma  any of several malignant neoplasms (usually of the skin) consisting of melanocytes

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