Knee MRI scans in a 58-year-old female participant in the Osteoarthritis Initiative who was administered a corticosteroid injection. (IMAGE)

Radiological Society of North America

Knee MRI scans in a 58-year-old female participant in the Osteoarthritis Initiative who was administered a corticosteroid injection.

Caption

Knee MRI scans in a 58-year-old female participant in the Osteoarthritis Initiative who was administered a corticosteroid injection. Sagittal intermediate-weighted images obtained (A) 2 years before injection, (B) at the time of injection, and (C) 2 years after injection show a focus on the medial femoral cartilage and trochlea. (C) The postinjection scan shows a new full-thickness cartilage lesion in the medial femoral cartilage (arrowhead), whereas images from the preinjection time points show a well-preserved medial femoral cartilage (A, B). The postinjection scan (C) also shows the development of a new full-thickness cartilage lesion in the medial femoral cartilage and a new bone marrow lesion in the trochlea (arrow), both of which were absent in the preinjection scans. These findings suggest structural deterioration following the corticosteroid injection.

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Radiological Society of North America (RSNA)

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