Fig. 3.
Magnetic resonance imaging (MRI) of the sacroiliac joints (SIJ) showing bilateral sacral joint bone marrow edema on in a patient with early psoriatic arthritis. The Bone marrow edema is more florid at the anterior part of the joint adjacent to the capsular enthesis. It remains to be determined whether the patterns of inflammation at entheses in soft tissue or in the bone may influence responses to therapy
