Resolution of Osseous Sarcoidosis with Methotrexate

Figure 4

Contrast-enhanced T1 fat-saturated axial images at the level of the SI joints prior to (a) and following (b) treatment show characteristic low signal “ghosts” (white arrows (b)) at sites of prior-enhancing osseous lesions (black arrows (a)) indicating fibro-fatty tissue at these locations.

(a)

(b)