285

FIGURE 285-1

FIGURE 285-2

FINDINGS Figure 285-1. Axial T2WI through the parietal bones. There is an ovoid hypointense posterior right parietal scalp nodule (arrow). Figure 285-2. Right parasagittal T1WI through the mass. The nodule is of intermediate intensity almost isointense with brain.

DIFFERENTIAL DIAGNOSIS Dermoid, epidermoid, sebaceous cyst, lipoma.

DIAGNOSIS Sebaceous (trichilemmal or pilar) cyst.

DISCUSSION

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