Pelligrini Stieda Syndrome: A Rare Complication of Knee Entorse

Axial, coronal and sagittal views of knee MRI of a 56 years old man with recurrent knee pain following a knee sprain, showing a calcification in the soft tissue situated mesial to the medial femoral condyle (red arrows (Figure 1)) corresponding to the ossification of the medial collateral ligament, suggesting the diagnosis of Pelligrini Stieda syndrome. The Pellegrini-Stieda syndrome is relatively infrequent and is commonly associated with sporting injuries. It occurs within 11 days to 6 weeks after trauma and patients may be asymptomatic or present a local pain and swelling in the medial aspect of the knee. The diagnosis can be suggested on the X-ray, and confirmed by the MRI which also delineates the extent of adhesion of the calcified mass to the MCL and the remaining ligamentous volume [1,2] (Figure 1).

References

[1] Mendes LF, Pretterklieber ML, Cho JH, Garcia GM and Resnick DL, et al. (2006) Pellegrini–Stieda disease: A heterogeneous disorder not synonymous with ossification/calcification of the tibial collateral ligament-anatomic and imaging investigation. Skeletal Radiol 35(12): 916- 922.

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[2] Miller TT. (2009) Imaging of the medial and lateral ligaments of the knee. Semin Musculoskelet Radiol 13(4): 340-352.

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