Ewing sarcoma - distal femur

Case contributed by Frank Gaillard
Diagnosis almost certain

Patient Data

Age: 9 years
Gender: Male
  • Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines.

Ill-defined lucency in the distal femur is noted, with a wide zone of transition and onion-skin periosteal reaction. 

CT confirms this finding with onion-skin periosteal reaction and aggressive lysis of bone. 

Case Discussion

This mass was confirmed to be a Ewing sarcoma of the distal femur in a 9 year old boy with onion skin periosteal reaction.

Case courtesy of Bob Cook, MD. Western Memorial Regional Hospital Corner Brook, Newfoundland.

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