PMC9512130_01
Sagittal T1 and T2-weighted sequence of the lower thoracic and lumbo-sacral spine demonstrate normal bone marrow signal and normal intervertebral disc spaces. Axial T2-weighted sequences of the pelvis demonstrate thickened, edematous anterior joint capsule of the right sacro-iliac joint with anterior extracapsular oedema tracking along the posterior margin of the iliopsoas muscle. Further oedema extends posteriorly towards the right gluteus minimus and medius muscles. Peri-articular marrow edema is seen on the iliac side of the right sacroiliac joint and no erosions demonstrated.
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f1
No drainable collection was identified following contrast administration. (Figure 1).