Presentation
Right knee pain in a patient under long-term steroid therapy for an autoimmune disease.
Patient Data
Age: 30 years
Gender: Female
From the case:
Bone infarction
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Intramedullary serpiginous lesions involving the lateral aspect of the distal femoral metaphysis, lateral femoral condyle and proximal metaphysodiaphyseal region of the tibia. They elicit iso-to hyposignal to the normal bone marrow on T1 centrally and a low signal peripheral rim (granulation tissue). The T2 and PD fat sat sequences show a double-line sign.
Normal appearance of both menisci, cruciate and collateral ligaments.
Case Discussion
MRI features most consistent with bone infarction in a patient under long-term corticosteroid therapy for an autoimmune disease.
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