Perfusion_MRI.pngIn the November 16, 2016 edition of The Journal of Bone & Joint Surgery, Kim et al. improve our understanding of how blood flow is restored to the necrotic femoral head in Legg-Calve-Perthes disease. Using a series of perfusion MRI scans, the authors evaluated 30 hips with Stage-1 or -2 disease; 15 of the hips were treated conservatively, and 15 underwent one of three operative interventions.

Revascularization rates varied widely (averaging 4.9% ± 2.3% per month), but the revascularization pattern was similar, converging in a horseshoe-shaped pattern toward the anterocentral region of the femoral epiphysis from the posterior, lateral, and medial aspects of the epiphysis.

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