Fifty-four patients (21 female; 6±4 years-old) matched the inclusion criteria. Overall, the most investigated areas were the thigh and the calf (nine patients each); in patients with osteomyelitis, the hip, the elbow, and the tibia were mostly involved (4 each, 7.4%) (Figure 1). Twenty-five patients (46.3%) had a diagnosis of osteomyelitis at MR. The following diagnoses were achieved in patients without osteomyelitis: arthritis and myositis (five each), osteonecrosis, subcutaneous abscess, and lymphangioma (two each) (Figure 2), cellulitis, osteoid osteoma, and metabolic disease (one each). Seven patients were negative. In two patients, a missed traumatic injury was identified by MR. The indication of MR for osteomyelitis had 42.6% accuracy, 76% sensitivity, and 14% specificity. The tested model was not significant (p=0.806).