title: [Obturator externus impingement after total hip replacement].
abstract: A patient with a painful total hip replacement that is not obviously loose presents a diagnostic challenge. One of the rare causes is psoas impingement syndrome. Because there are several periarticular muscles, further muscle impingements are possible. We report on a case of painful obturator externus muscle impingement on the acetabular cup. On magnetic resonance imaging, a pathologic contact between the obturator externus muscle and the caudal rim of the cup was seen. A positive injection confirmed the pathologic contact.
authors.affiliation: Centrum für Muskuloskeletale Chirurgie, Klinik für Orthopädie, Klinik für Unfall- und Wiederherstellungschirurgie, Charité-Universitätsmedizin Berlin, Chariteplatz 1, 10117, Berlin, Deutschland. michael.mueller@charite.de
authors.forename: M
authors.initials: M
authors.lastname: Müller
authors.forename: C
authors.initials: C
authors.lastname: Perka
authors.forename: S
authors.initials: S
authors.lastname: Tohtz
mesh_terms: D018771:Arthralgia / Q000175:diagnosis* / Q000209:etiology*; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007593:Joint Instability / Q000175:diagnosis* / Q000209:etiology*; D008875:Middle Aged; D009135:Muscular Diseases / Q000175:diagnosis* / Q000209:etiology*
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