Ischiofemoral impingement (annotated MRI)
Right sided buttock pain for last 2 years, not relieved by physiotheraphy.
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Both ischio-femoral spaces are narrowed with edema in both quadratus femoris muscles, more on the right side.
The exact cause of this syndrome is unknown, it is thought that narrowing of the ischiofemoral space is the inciting factor, leading to edema/tears in the quadratus femoris muscle - an external rotator of the hip.
An ischiofemoral (IF) space measurement of <17 mm is said to be suggestive of this syndrome. In one study by Torriani et al, cases had a mean IF space measurement of 13 mm vs 23 mm in controls.
- 1. Kerr R (2016) MRI Web Clinic — October 2012 Ischiofemoral Impingement Syndrome. In: Radsource. http://radsource.us/ischiofemoral-impingement-syndrome/. Accessed 9 Feb 2016
- 2. Lee S, Kim I, Lee S, Lee J (2013) Ischiofemoral Impingement Syndrome. Ann Rehabil Med 37:143
- 3. Torriani M, Souto S, Thomas B, Ouellette H, Bredella M (2009) Ischiofemoral Impingement Syndrome: An Entity With Hip Pain and Abnormalities of the Quadratus Femoris Muscle. American Journal of Roentgenology 193:186-190