[Iliopsoas tendinitis--rare cause of pain following implantation of a total hip endoprosthesis].

Pain following implantation of a total hip endoprosthesis is described in the literature with an incidence of 1-17.6%, depending on the type of prosthesis. The underlying causes are numerous; the primary reasons for such pain are septic and nonseptic loosening of the prosthesis, periarticular heterotopic ossifications, or trochanteric bursitis. Less common reasons are muscular hernia, squeezing of the joint capsule, distal nerve lesions, stress fractures, compartment syndromes, or neoplasia.One can find only a few reports about tendinitis of the iliopsoas muscle as a cause for pain following implantation of an endoprosthesis in total hip arthroplasty. We now report about a female patient with therapy-resistant pain after total hip replacement, caused by tendinitis of the iliopsoas muscle. We introduce the transpositioning of this tendon from the lesser trochanter to the proximal anterior femur and bony refixation with a PDS cord as a new operative treatment.