Figure 2

Whole-body magnetic resonance imaging of chronic nonbacterial osteomyelitis. Whole-body magnetic resonance imaging of one patient with extensive multifocal inflammatory radiological lesions at time of diagnosis: T2-weighted images with fat suppression (inverse recovery sequences, TIRM). The os sacrum and the acetabulum (all three osseous parts) did show severe signal elevation in the TIRM sequence. Further lesions are seen in the metaphyses of both proximal and distal femurs, proximal tibias and fibulas predominantly in the epiphyses/metaphyses and in the distal tibia and fibula with periosteal edema on the right side, supporting the clinical diagnosis of periostitis and arthritis. Signal alterations/edema in the skeleton of the feet can be noted at the basis of os metatarsale V, os metatarsale I and in the tuber calcanei on the right side; on the left side, the basis and the proximal parts of os metatarsale I and the distal os metatarsale V and the proximal phalanx V are affected.