Extraosseous Ewing's Sarcoma of the Chest Wall: A Case Report and Review of Literature

Figures

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  Figure 1. Extraosseous Ewing's sarcoma (EES) chest CT scan of the right chest wall. A. Axial lung window. B. Axial mediastinal window. (A-B) Soft tissue mass is seen in the right lower lung and the posterolateral base of the chest wall. C. Axial bone window. Mild bone destruction is seen near the right ninth rib.

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  Figure 2. Extraosseous Ewing's sarcoma (EES) magnetic resonance imaging (MRI) of the right chest wall non-enhanced examination. A. Axial T2-weighted imaging fat suppression (T2WI-FS) showed high and slightly low signal; B. Axial T1-weighted imaging (T1WI) showed slightly low signal.

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  Figure 3. Extraosseous Ewing's sarcoma (EES) magnetic resonance imaging (MRI) of the right chest wall enhanced and non-enhanced examination. A. Axial diffusion weighted imaging (DWI) showed mixed edge high signal; B. Axial apparent diffusion coefficient (ADC) showed edge low signal; C. Axial vT1-weighted imaging (T1WI)-enhanced scan showed edge enhancement, but no enhancement was seen in the central necrotic area.

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  Figure 4. Pathology H&E, ×400 (10×40). The tumor cells exhibit a diffuse infiltrative growth pattern. The neoplastic cells are round or ovoid in shape with scant cytoplasm, and some cells show clear cytoplasm. Fibrous septa are observed. Tumor cells are arranged around blood vessels, forming Homer-Wright rosette structures (red circle).