Fig 2. A, Axial fast spin-echo (FSE) T2-weighted image with fat saturation (TR, 3300 ms; TE, 86.4 ms; echo-train, 12). B, Coronal spin-echo T1-weighted image (TR, 400 ms; TE, 8.0 ms) after gadolinium administration (20 mL). Axial FSE T2-weighted image (A) demonstrates abnormal marrow edema in the frontal bone (arrow). There is subgaleal/periosteal inflammatory tissue adjacent to the right frontal destructive lesion, which exhibits increased signal intensity on T2-weighted image (A, white arrowhead). The bone destruction is irregular and predominantly involves the outer cortex (A, black arrowhead). The vertex lesion enhances intensely, involving nearly the entire thickness of the calvaria (B, black arrowhead). Mild dural enhancement is noted along the right convexity (B, arrow), consistent with inflammatory involvement. The adjacent subgaleal/periosteal inflammatory process enhances intensely (white arrowheads). No parenchymal signal-intensity abnormalities are identified.