#benign_tumor__benign_tumour__nonmalignant_tumor__nonmalignant_tumout__nonmalignant_neoplasm  a tumor that is not cancerous
  supertype:  tumor__tumour__neoplasm  an abnormal new mass of tissue that serves no purpose
  subtype:  chondroma  a common benign tumor of cartilage cells
  subtype:  myxoma  a benign tumor of connective tissue containing jellylike material
  subtype:  osteoblastoma  benign tumor of bone and fibrous tissue; occurs in the vertebrae or femur or tibia or arm bones (especially in young adults)
  subtype:  osteochondroma  benign tumor containing both bone and cartilage; usually occurs near the end of a long bone

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