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chondroblastoma

benign cartilage producing neoplasm usually arising in skeletally immature epiphyses Epidemiology: 1) < 1% of all bone tumors 2) > 75% involve long bones 3) most between 10 and 25 years of age Pathology: Immunohistochemistry: - vimentin: + - S100: + - NSE: + - CD68 - - potential for aberrant cytokeratin expression (CK7, CK8, CK18, CK19)

General

chondroid neoplasm (cartilage neoplasm)

References

  1. Dabbs. Diagnostic Immunohistochemistry. Churchill Livingstone. 2002, page 100