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Fig. 12 | Insights into Imaging

Fig. 12

From: Tumor and tumorlike conditions of the pleura and juxtapleural region: review of imaging findings

Fig. 12

Diagnosis: Ewing sarcoma. Technique: standard chest radiography and contrast-enhanced chest CT. Description: A 23-year-old man was referred for a chest radiograph due to pain at the right hemithorax. The postero-anterior chest radiographs (a, b) show an opacity (arrow) projecting at the level of the 7th right rib. An external radio-opaque marker was placed on the painful area. The additional contrast-enhanced CT further characterizes the mass encasing the 7th right rib with a locoregional aggressive periosteal sunburst type reaction and a surrounding soft tissue component (c, d). On the axial T1-weighted MR image (e) the lesion has an isointense signal to muscle and a high signal intensity on the axial FS T2-WI (f) with invasion of the muscles of the chest wall (arrows). After intravenous contrast administration, the lesions show a heterogeneous enhancement (g), predominantly at the periphery of the lesion. The coronal T2-weighted MR image (h) shows the extrinsic impression of the lesion on the liver

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