Bone or cartilage mass classification

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Maria Fernanda Villarreal, M.D. [2]

Bone and cartilage tumors may be classified according to the WHO histological classification system into benign and malignant tumors, and categorized into 5 sub-types: cartilage tumors, osteogenic tumors, fibrohistiocytic tumors, notochordal tumors, hematopoietic tumors, and miscellaneous tumors.^[1][2] In addition, bone and cartilage tumors may be sub-classified according to tumor location into 4 subtypes: diaphysis, metaphysis, epiphysis, and ungrouped/others.^[3]

Bone and cartilage tumors may be classified by location, origin, and histopahological origin.

• Tumor location

• Diaphysis
• Epiphysis
• Metaphysis
• Other/Unclassifed

• Tumor nature

• Benign
• Malignant

• Origin

• Primary
• Secondary ( see “Secondary tumors classification” below)

• Histopathological origin

• Cartilage tumors
• Osteogenic tumors
• Fibrohistiocytic tumors
• Notochordal tumors
• Hematopoietic tumors
• Miscellaneous tumors.

• The table below summarizes the classification of bone and cartilage tumors according to histopathological origin, tumor location, and tumor nature.^[1][2]

• The table below summarizes the classification of secondary bone tumors (also known as “metastases”) according to location, and bone formation pattern.

Template:WikiDoc Sources