PMC5175789_01
Axial plain CT (bone window settings) demonstrates a lytic lesion in the right parietal bone (arrow).
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Plain CT images revealed a lytic lesion with a narrow zone of transition in the posterolateral part of the right parietal bone (Figure 1), filled with an oval-shaped large mass measuring 75x75x40 mm with smooth borders.
The lesion is hyperdense compared to the neighbouring cerebral cortex (soft tissue window settings) (thick arrow). Mild midline shift to the left can be seen (thin arrow).
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The lesion was hyperdense as compared to the neighbouring cerebral cortex (Figure 2).
Axial fused image of the right parietal extra-axial mass lesion (arrow).
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PET/CT images (Figure 3).
Axial plain CT obtained seven months later reveals almost complete regression of the lesion (arrow).
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Seven months later, a control FDG PET/CT obtained after chemotherapy and radiotherapy revealed almost complete regression of the right parietal, extra-axial, extradural mass lesion, where only a residual curvilinear hypodense soft tissue with a maximum thickness of 3.5-4.0 mm and linear calcifications remained (Figures 4, 5).
Axial fused image obtained seven months later demonstrates no hypermetabolism in that area (arrow).
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Seven months later, a control FDG PET/CT obtained after chemotherapy and radiotherapy revealed almost complete regression of the right parietal, extra-axial, extradural mass lesion, where only a residual curvilinear hypodense soft tissue with a maximum thickness of 3.5-4.0 mm and linear calcifications remained (Figures 4, 5).