IIschiofemoral Impingement: Hip Pain of Infrequent Cause

Variability of the Ischiofemoral Space Relative to Femur Position: An Ultrasound Study

“…Although ischiofemoral impingement may be caused by increased tissue within the ischiofemoral space, research thus far has focused on factors that narrow the ischiofemoral space [1,3‐10,12,13,17]. Ischiofemoral space narrowing can result from congenital or acquired conditions and can be dynamic or static.…”

“…Because our study demonstrated narrowing of the ischiofemoral space during femoral adduction or external rotation relative to other positions, conditions leading to these motions (eg, tight adductors or external rotators and weak abductors or internal rotators) may dynamically narrow the ischiofemoral space. Furthermore, prior studies have reported that patients with ischiofemoral impingement experience their symptoms during hip extension, adduction, and external rotation [3,5,9,10,12,13], which suggests that in addition to adduction and external rotation, hip extension may also narrow the ischiofemoral space. Further research is required to determine the influence of hip sagittal plane motion.…”

“…The 2 primary forms of hip impingement are femoroacetabular impingement and ischiofemoral impingement [1]. Whereas femoroacetabular impingement is a well‐described entity [2], the literature on ischiofemoral impingement is sparse [1,3‐18]. Ischiofemoral impingement can occur when the quadratus femoris muscle is compressed between the lesser trochanter and the ischium, resulting in buttock, groin, or medial thigh pain or, occasionally, snapping [6,7].…”

Can Ultrasound Accurately Assess Ischiofemoral Space Dimensions? A Validation Study

“…Hip impingement presents as one of 2 primary types: 1) ischiofemoral impingement (IFI) and 2) femoroacetabular impingement [1]. Although a majority of the medical literature is devoted to femoroacetabular impingement [2], there is a growing number of studies that investigate IFI [1‐30]. IFI is characterized by narrowing of the space between the lesser trochanter of the femur and ischial tuberosity, resulting in compression of the quadratus femoris muscle.…”

Can a Brief Training Session Prepare Physician Sonographers of Differing Experience to Measure the Ischiofemoral Space? A Reliability Study

“…The 2 primary forms of hip impingement are femoroacetabular impingement and ischiofemoral impingement (IFI) . Although femoroacetabular impingement is more well known and has been described in depth in the literature, there was limited research regarding IFI until recently . IFI occurs when the quadratus femoris muscle is compressed between the medial border of the lesser trochanter and the lateral border of the ischial tuberosity.…”