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MR imaging findings in recurrent primary osseous Ewing sarcoma
W M Kauffman1, B D Fletcher, S L Hanna
1St. Jude Children's Research Hospital, Department of Diagnostic Imaging, Memphis, TN 38101.
Magnetic Resonance Imaging
|January 1, 1994
Summary
Magnetic resonance (MR) imaging effectively detects local recurrence of Ewing sarcoma. This imaging technique is valuable for routine follow-up of primary osseous Ewing sarcoma, outperforming other methods.
Area of Science:
- Oncology
- Radiology
- Medical Imaging
Background:
- Ewing sarcoma is a primary bone cancer requiring vigilant follow-up.
- Early detection of local recurrence is crucial for patient outcomes.
- Conventional imaging methods have limitations in diagnosing Ewing sarcoma recurrence.
Purpose of the Study:
- To evaluate the diagnostic value of magnetic resonance (MR) imaging for local recurrence of osseous Ewing sarcoma.
- To compare the efficacy of MR imaging with other modalities in detecting recurrence.
Main Methods:
- Retrospective review of 11 patients with confirmed local Ewing sarcoma recurrence.
- Comparison of MR imaging with radiographs, CT scans, and Tc99m-MDP bone scintigraphy.
- Analysis of MR imaging findings including signal intensity and soft tissue mass identification.
Main Results:
- MR imaging identified 9 out of 11 local recurrences.
- Computed tomography (CT) was diagnostic in 4 of 6 cases.
- Tc99m-MDP bone scintigraphy and plain radiographs showed lower diagnostic rates.
Conclusions:
- MR imaging is a valuable tool for diagnosing local recurrence of osseous Ewing sarcoma.
- MR imaging demonstrates superior sensitivity compared to CT, bone scintigraphy, and radiographs.
- Specific MR findings aid in the detection of Ewing sarcoma relapse.