The aim of this study was to evaluate whether MRI of the sacroiliac joints is able to facilitate the diagnosis of rheumatic disease in paediatric patients and to determine whether these findings correlate with blood inflammatory markers such as elevated leucocyte count, C-reactive protein (CRP), erythrocyte sedimentation rate (ESR), human leucocyte antigen (HLA) class I molecule B27 and Cw6, anti-nuclear antibodies (ANA), and rheumatoid factor (RF). Here, CRP is linked to rheumatic disorder.