CHORUS
Collaborative Hypertext of Radiology
Musculoskeletal system
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Ewing sarcoma
small, round-cell sarcoma of mesenchyme of medullary bone
- age 5 - 14 yrs
- most lethal of all 1' bone tumors
- any bone
- < 20 y/o: long bones
- > 20 y/o: flat bones (where there's still red marrow)
- purely lytic (62%), purely sclerotic (15%)
- periosteal reaction (onion-skin or perpendicular)
- similar lesion at different age
- < 5 y/o -- neuroblastoma
- > 30 y/o -- mets, reticulum cell sarcoma
Charles E. Kahn, Jr., MD - 2 February 1995
Last updated: 1 October 2013
Copyright © 2013, Charles E. Kahn, Jr.
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