220

FIGURE 220-1

FIGURE 220-2

FIGURE 220-3

FIGURE 220-4

FINDINGS Figure 220-1. Bone scintigraphy. There is abnormal tracer uptake in the calvarium, skull base, and pelvis (arrows). Figure 220-2. NCCT head bone window. There are cortical thickening, abnormal bone matrix, and patchy sclerosis (hyperdensity) (arrows). Figure 220-3. Axial T2WI through the cerebral hemispheres. There are diffuse thickening and heterogeneous marrow intensity of the cranial vault (arrows). Figure 220-4. Axial post-contrast T1WI through the cranial vault. There are marrow replacement, expansion of the diploic space, and patchy enhancement (arrows).

DIFFERENTIAL DIAGNOSIS Paget disease, metastases, fibrous dysplasia.

DIAGNOSIS Paget disease.

DISCUSSION

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