Figure 8a. Calvarial lesion in a 34-year-old woman with sarcoidosis. Bone scintigraphy showed radiotracer uptake in the left temporal bone. (a) Axial CT scan shows a subtle expansile lesion of the left temporal bone with cortical thinning (arrow). (b) Axial T1-weighted MR image (450/8) shows low-signal-intensity intramedullary infiltrate in the left temporal bone (arrow). The lesion is more conspicuous at CT. No extraosseous mass was demonstrated. The patient declined to undergo biopsy.