WHO classification of tumors of bone

Last revised by Leonardo Lustosa on 08 Aug 2022

The World Health Organization (WHO) classification of bone tumors is the most widely used pathologic classification system for such disorders. The current revision, part of the 5th edition of the WHO series, was published in 2020 and is reflected in the article below 1.

Newly introduced entities include the following 1:

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Cases and figures

  • Case 1: osteochondroma
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  • Case 2: enchondroma
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  • Case 3: chondromyxoid fibroma
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  • Case 4: chondroblastoma
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  • Case 5: chondrosarcoma
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  • Case 6: osteoid osteoma
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  • Case 7: osteosarcoma
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  • Case 8: hemangioma - vertebral
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  • Case 9: aneurysmal bone cyst
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  • Case 10: aneurysmal bone cyst (MRI)
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  • Case 11: giant cell tumor
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  • Case 12: non-ossifying fibroma
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  • Case 13: simple bone cyst
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  • Case 14: fibrous dysplasia in tibia
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  • Case 15: lipoma of bone
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  • Case 16: Langerhans cell histiocytosis
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