Ischiofemoral Impingement: Assessment of Mri Findings and Their Reliability

Abstract

Objective: To evaluate the Magnetic Resonance Imaging (MRI) findings and their validity in patients with ischiofemoral impingement syndrome (IFI) .Methods:We retrospectively analyzed 55 hips. MRI findings of 30 hips were consistent with IFI syndrome. Twenty five hips had no MRI findings consistent with IFI syndrome. We compared the ischiofemoral space (IFS), quadratus femoris space (QFS), ischial angle (IA) and femoral neck angle (FNA) between the age and gender matched groups. We also analyzed edema, fatty replacement and partial or total rupture of quadratus femoris muscle. Mann Whitney U test was used to compare the data.Results: We observed atrophy in eight, fatty replacement also in eight and edema in all of the quadratus femoris muscle. QFS (p<0.001) and IFS (p<0.001) were significantly lower in patients as compared to the control group. IA (p=0.012) and FNA (p=0.010) values were significantly higher in patients compared with the control group.Conclusion: MRI findings of IFI include narrowing of QFS and IFS and increase in IA and FNA. This condition should be kept in mind for patients with hip pain. Level of Evidence III, Retrospective Study.

Normal Ischiofemoral Distance and Its Associated Factors: Computed Tomography–Based Study

“…The patient should have imaging evidence of narrow ischiofemoral distance (IFD)dthe gap between the posteromedial cortex of the lesser trochanter and lateral cortex of ischial tuberositydand edema, atrophy, and/or fatty degeneration of quadratus femoris muscle on magnetic resonance imaging (MRI). 1,[4][5][6] Normal IFD in the general population is not defined, and demographic/constitutional factors affecting IFD are not yet known. 7 The purposes of this study are (1) to measure the IFD in nondiseased hips and (2) to reveal patient demographic and anatomical factors associated with IFD.…”

Magnetic resonance imaging of the hip: anatomy and pathology

“…Several studies have found that the measured ischiofemoral and quadratus femoris spaces were significantly different between symptomatic and control groups. The mean ischiofemoral and quadratus femoris distances in symptomatic groups ranged from 13 to 17 mm and from 7 to 12 mm, respectively [ 67 , 68 ]. The narrowed ischiofemoral and quadratus femoris spaces may be congenital with a female preponderance, or acquired from intertrochanteric fractures, hip surgery including arthroplasty or osteotomy, hip joint OA with superior and medial migration of the femur, hamstring enthesopathy, and osteochondroma [ 67 , 69 ].…”

Ischiofemoral space dimensions for ischiofemoral impingement: is it different in children?

“…IFI, first defined by Johnson in 1977 [2], has been an important area of interest in the literature from the past decade [13,[22][23][24][25][26][27]. Nevertheless, lack of information regarding management procedures, pathophysiology, and diagnostic techniques of IFI is still present [3,9].…”

“…Taking case-controlled comparisons consisting of a small number of samples into account, some researchers emphasized that IFS size needs to be determined in a large number of asymptomatic individuals (with different age, sex, or region) for overall understanding of the pathological anatomy of IFI [18][19][20]28]. Generally diagnosed in middle-aged and older women, IFI may affect individuals of all ages and sexes [5,6,13,16,22,29,30]. The current literature on pediatric subjects with IFI is limited to a few case reports [30][31][32][33][34] and two casecontrolled comparisons [28,29].…”