Screw penetration of the iliopsoas muscle causing late-onset pain after total hip arthroplasty: A case report

BACKGROUND Postoperative pain following total hip arthroplasty(THA)may occur in a few patients but may pose a significant challenge to surgeons if the etiology is not identified.Herein,we report the case of a patient who developed late-onset pain following THA due to screw penetration of the iliopsoas tendon.CASE SUMMARY We report the case of a 77-year-old man who developed inguinal pain 7 years after THA.While the symptoms resembled that of iliopsoas impingement by the acetabular cup,the pain resolved only when the supplementary acetabular screw protruding through the ilium was decompressed.Decompression was performed using the pararectus approach.The patient was able to ambulate pain-free immediately after surgery.CONCLUSION A protruded screw through the ilium may penetrate the iliopsoas muscle,causing pain following THA.Pain may resolve with the decompression of the protruded screw.