Progressive systemic sclerosis involving the knee
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There are numerous irregularly shaped calcific densities in the subcutaneous soft tisssues anterior to the knee, extending from the prepatelar region to the proximal tibial diaphysis. There is also a fleck of calcification noted anterior to the mid tibial diaphysis. There is no joint effusion.
1 case question available
The subcutaneous calcifications seen in this case are reminiscent of dermatomyositis, but this patient had a known history of scleroderma.