Narrowing of ischiofemoral and quadratus femoris spaces in pediatric ischiofemoral impingement

Objective To correlate MRI findings of quadratus femoris muscle edema (QFME) with narrowing of the ischiofemoral space (IFS) and quadratus femoris space (QFS) in children, and to identify threshold values reflecting an anatomic architecture that may predispose to ischiofemoral impingement.