Central Nervous System Extraosseous Ewing Sarcoma: Radiologic Manifestations of This Newly Defined Pathologic Entity
J.S. Pekalaa,
S. Gururanganb,
J.M. Provenzalea and
S. Mukundan, Jr.a,c
a Department of Radiology and The Brain Tumor Center at Duke, Durham, NC
b Department of Pediatrics, Duke University Medical Center, Durham, NC
c Department of Biomedical Engineering, Duke University, Durham, NC
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Fig 1. A, Unenhanced CT image demonstrates a 2.4 x 3.8-cm hyperattenuated, well-circumscribed, extra-axial mass centered on the right tentorium.
B, Precontrast axial T1-weighted MR image reveals a heterogeneously hyperintense mass with a broad tentorial attachment.
C, Postcontrast coronal T1-weighted image reveals a homogeneously enhancing mass demonstrating a smooth lobular contour, with both infratentorial and supratentorial components.
D, Hyperintense signal intensity on DWI is seen within the medial aspect of the lesion.
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Fig 2. A, Precontrast axial T1-weighted image reveals a 8.0 x 8.0-cm predominantly hyperintense lobular medial right frontal lobe mass that was large enough to obscure the distinction between an intra-axial or extra-axial mass lesion.
B, Postcontrast axial T1-weighted image demonstrates diffuse heterogeneous enhancement.
C, Axial T2-weighted image with diffuse heterogeneous signal intensity
D, Predominantly hyperintense signal intensity on axial DWI.
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