Using proximal hamstring tendons as a landmark for ultrasound- and CT-guided injections of ischiofemoral impingement

Ischiofemoral impingement has been reported in a number of cases as an association between hip pain and quadratus femoris MRI signal abnormality, with concurrent narrowing of the ischiofemoral space. While the literature has included much emphasis on the imaging characteristics useful in the diagnosis of this entity, information on treatment has been scant, with few case reports of surgical resection of the lesser trochanter and incomplete descriptions of steroid injection techniques. We report a case of ultrasound- and CT-guided steroid injection into the ischiofemoral space via the proximal hamstring tendons in a 57-year-old female who had imaging and clinical characteristics of ischiofemoral impingement. The technique is described as a safe alternative to other possible injection techniques.