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case_images: A - MRI of the sacroiliac joints: regions of bone marrow oedema in both sacroiliac joints, the lesions are more pronounced in the left sacroiliac joint, the articular spaces are not widened, no exudate is seen, the contours of the left sacroiliac joint are irregular, those of the right one are smooth, signs of subchondral sclerotization, more pronounced on the left side. B - MRI of the pelvis: picture of bone marrow oedema, enhanced after gadolinium administration in the region of the greater trochanters of both femoral bones, the lesions are more pronounced on the right side.
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case_images: The MRI examinations revealed bilateral sacroiliitis, the lesions were more pronounced on the left side (Fig. 1A), and the picture of bone marrow oedema was evidently enhanced after gadolinium administration in the region of the greater trochanters of both femoral bones; no pathological changes were observed in the small pelvis organs (Fig. 1B).
case_images: MRI of the whole body: bone marrow oedema in the right tarsal bone, in the first metatarsal bone of the right foot, in the distal metaphysis of the left tibial bone, in the intertrochanteric regions of the femoral bones, in the sacral bone in the region of the left sacroiliac joint.
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case_images: Follow-up MRI of the pelvis: bone marrow oedema in the right sacroiliac joint, in the trochanter of the left femur, in the pubic symphysis bones, partial regression of the lesions in the trochanter of the right femur, complete regression in the left sacroiliac joint - migrating inflammatory lesions.
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case_images: The changes in MRI scan are presented in Figure 3.
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