Similar to hip osteoarthritis, most injections in the iliopsoas region before the last decade were done via fluoroscopic guidance. It is currently used for both diagnostic (intra-articular vs extra-articular hip pain) and therapeutic purposes. In 39 patients with suspected iliopsoas tendinopathy, 49 % of patients reported improvement at one month after a fluoroscopic guided iliopsoas bursa injection 24
. Other studies are very limited in sample size, but have shown to be effective in patients with iliopsoas tendinitis following total hip arthroplasty 25
and in dancers with recalcitrant iliopsoas tendinitis 26
. A 2018 study showed improved symptoms, pain, function in sports, quality of life and decreased pain with activities of daily living in patients with iliopsoas tendinopathy at 6 weeks. This was true whether or not the patient had concomitant intra-articular hip abnormalities such as FAI, labral tears, hip dysplasia, etc 27
. This study also had many more female than male participants (154 female vs. 24 male 27). More long term trials are needed to draw stronger conclusions on effectiveness and safety.