{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T15:55:53Z","timestamp":1780502153757,"version":"3.54.1"},"reference-count":24,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2023,4,14]],"date-time":"2023-04-14T00:00:00Z","timestamp":1681430400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JCM"],"abstract":"<jats:p>Background: Hip resurfacing arthroplasty (HRA) patients require subsequent annual screening for postoperative complications. Ultrasonography may be useful for this purpose but lacks a screening protocol for hips. The purpose of this study was to evaluate the accuracy of ultrasonography for detecting postoperative complications in HRA patients using a screening protocol that specifically targets periprosthetic muscles. Methods: We enrolled 45 hips from 40 HRA patients with a mean follow-up period of 8.2 years. MRI and ultrasonography scans were simultaneously conducted at follow-up. The ultrasonography assessments were conducted on the anterior part of the hip that targets iliopsoas, sartorius, rectus femoris, lateral with anterior superior and inferior iliac spine (ASIS and AIIS) as bony landmarks, and the lateral and posterior parts that target fascia tensor, short rotators, and gluteus minimus, medius, and maximus with greater trochanter and ischial tuberosity as bony landmarks. The accuracy of diagnosing postoperative abnormalities and the visibility of periprosthetic muscles were compared between these two modalities. Results: Both MRI and ultrasonography detected an abnormal region in eight cases comprising two infections, two pseudotumors, and four patients with greater trochanteric bursitis. Among these cases, four hips required implant removal. The increase in anterior space, measured as the distance between the iliopsoas and resurfacing head, was a good indicator for the abnormal mass in these four HRA cases. In the assessment of periprosthetic muscles, MRI showed a much lower visibility than ultrasonography in the iliopsoas (6.7% vs. 100%), gluteus minimus (6.7% vs. 88.9%), and short rotators (8.8% vs. 71.4%) due to implant halation. Conclusions: By targeting periprosthetic muscles, ultrasonography can detect postoperative complications as effectively as MRI assessments in HRA patients. Ultrasonography has superior visibility in the periprosthetic muscles of HRA patients, indicating its utility for the screening of small legions in these cases which may not be visible by MRI.<\/jats:p>","DOI":"10.3390\/jcm12082871","type":"journal-article","created":{"date-parts":[[2023,4,14]],"date-time":"2023-04-14T02:28:12Z","timestamp":1681439292000},"page":"2871","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Targeting of Periprosthetic Muscles for the Ultrasonographic Screening of Hip Abnormalities in Hip Resurfacing Arthroplasty Patients"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4432-2303","authenticated-orcid":false,"given":"Hyonmin","family":"Choe","sequence":"first","affiliation":[{"name":"Department of Orthopaedic Surgery, Yokohama City University, Yokohama 236-0004, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2419-0860","authenticated-orcid":false,"given":"Naomi","family":"Kobayashi","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Yokohama City University Medical Center, Yokohama 236-0027, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Koki","family":"Abe","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Yokohama City University, Yokohama 236-0004, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuta","family":"Hieda","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Yokohama City University, Yokohama 236-0004, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroyuki","family":"Ike","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Yokohama City University, Yokohama 236-0004, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ken","family":"Kumagai","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Yokohama City University, Yokohama 236-0004, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kazuma","family":"Miyatake","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Yokohama City University, Yokohama 236-0004, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takahiro","family":"Fujisawa","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Yokohama City University, Yokohama 236-0004, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yutaka","family":"Inaba","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Yokohama City University, Yokohama 236-0004, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,4,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"145","DOI":"10.1302\/0301-620X.94B2.27736","article-title":"Groin pain after replacement of the hip: Aetiology, evaluation and treatment","volume":"94","author":"Henderson","year":"2012","journal-title":"J. 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