• Ryan M Nunley, Joyce M Wilson, Louis Gilula, John C Clohisy, Robert L Barrack, and William J Maloney.
• Department of Orthopaedic Surgery, Washington University School of Medicine, 660 South Euclid Avenue, Campus Box 8233, St Louis, MO 63110, USA. nunleyr@wustl.edu
• Clin. Orthop. Relat. Res. 2010 Feb 1;468(2):519-26.

UnlabelledImpingement of the iliopsoas tendon is an uncommon cause of groin pain after total hip arthroplasty (THA). We asked whether selective steroid and anesthetic injections for iliopsoas tendonitis after THA would relieve pain and improve function. We retrospectively reviewed 27 patients with presumed iliopsoas tendinitis treated by fluoroscopically guided injections of the iliopsoas bursa. Pre- and immediately postinjection, questionnaires and telephone followup questionnaires were administered to determine patient outcomes. Four patients were lost to followup and we were unable to obtain information from relatives on an additional four; the questionnaire was administered to the remaining 19 patients, including six who subsequently had surgery at an average of 44.6 months (range, 25-68 months) after their first injection. The average modified Harris hip score in the 19 patients improved from 61 preinjection to 82 postinjection and the average pain improved from 6.4 preinjection to 2.9 postinjection, but eight patients (30%) required a second injection at an average of 8.2 months after the first injection. Ultimately, six patients (22%) had an additional surgical procedure to address the underlying cause of the iliopsoas irritation. Iliopsoas tendonitis is uncommon after THA but should be considered in the differential diagnosis of all patients who present with groin pain after THA. Selective steroid and anesthetic injections of the iliopsoas bursa give adequate pain relief in the majority of patients and should be considered part of the nonoperative treatment plan before surgical release of the iliopsoas tendon or component revision.Level Of EvidenceLevel IV, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.

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