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Primary Ewing sarcoma of rib.
R P Moser1, M J Davis, F W Gilkey
1Department of Radiology, Ottawa Civic Hospital, Ontario, Canada.
Summary
Ewing sarcoma, a rare bone cancer in young adults, can affect ribs. Radiographic findings show it
Area of Science:
- Oncology
- Radiology
- Orthopedic Oncology
Background:
- Ewing sarcoma is a highly malignant bone tumor common in adolescents and young adults (10-25 years).
- Primary rib involvement is infrequent, representing 10% of cases.
Purpose of the Study:
- To describe the spectrum of radiologic findings for primary Ewing sarcoma of the rib.
- To correlate radiographic features with pathological findings.
Main Methods:
- Retrospective review of 328 histologically proven Ewing sarcoma cases over 40 years.
- Identification and analysis of 34 cases with primary rib involvement.
- Radiographic assessment of lesion characteristics and associated hemithorax abnormalities.
Main Results:
- Ewing sarcoma of the rib occurred in 10% of cases (34/328).
- Predominantly lytic lesions were observed in 82% of cases; mixed or sclerotic patterns were less common.
- Rib expansion was noted in 35% of cases, typically mild.
- Associated hemithorax abnormalities ranged from subtle to complete opacification.
Conclusions:
- Ewing sarcoma of the rib presents with diverse radiologic findings, most commonly lytic.
- Radiographic evaluation is crucial for identifying primary rib Ewing sarcoma and associated complications.
- Understanding these imaging features aids in diagnosis and management.