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Imaging characteristics of primary cranial Ewing sarcoma.
Wai-Yung Li1, Penelope Brock, Dawn E Saunders
1Departments of Radiology, Great Ormond Street Hospital for Children, Great Ormond Street, London, WC1N 3JH, UK. wyli@btinternet.com
Pediatric Radiology
|April 9, 2005
Summary
Primary cranial Ewing sarcoma, a rare childhood bone tumor, presents as an extra-axial mass. Imaging reveals high CT attenuation and low T2 MRI signals, aiding diagnosis.
Area of Science:
- Pediatric Oncology
- Neuroradiology
- Skeletal Radiology
Background:
- Ewing sarcoma is a significant pediatric bone malignancy, second to osteosarcoma.
- Primary Ewing sarcoma of the skull is rare, with limited focus on its imaging characteristics.
- Existing literature often emphasizes neurosurgical aspects and CT findings.
Observation:
- This study reviews the neuroimaging features of three pediatric cases with primary cranial Ewing sarcoma.
- The focus is on Magnetic Resonance Imaging (MRI) and Computed Tomography (CT) findings.
- Cases involved primary Ewing sarcoma originating in the cranial bones.
Findings:
- Observed an extra-axial mass on neuroimaging.
- CT scans showed high attenuation characteristics.
- MRI revealed low signal intensity on T2-weighted images, with features like hemorrhage, dural extension, and contrast enhancement.
Implications:
- CT attenuation and MRI signal properties correlate with the dense cellular structure of Ewing sarcoma.
- These imaging features are crucial for diagnosing primary cranial Ewing sarcoma.
- Understanding these characteristics can improve early detection and management of this rare tumor.