title: Recurrent total knee arthroplasty dislocation after dorsal meningioma diagnosed.
abstract: We report on a 68-year-old woman with gonarthrosis who underwent total knee arthroplasty. Having initially achieved a satisfactory result, she developed at 5 months postoperation an irreducible flexion contracture necessitating revision surgery; but no pathological findings were discovered. In the immediate postoperative period, the patient developed a severe spasm of the hamstring muscles and a paralysis of the external popliteal sciatic nerve with a posterior dislocation of the knee. After reduction, an electromyography study showed an alteration in medullary sensitive conduction; and the magnetic resonance image showed a lesion compatible with meningioma. This complication has not been previously described as a consequence of spinal tumor. Technical considerations are described for this rare complication, which remains a serious challenge for the orthopedic surgeon.
authors.affiliation: Department of Orthopaedic Surgery, Hospital Clínico San Carlos, Madrid, Spain.
authors.forename: Yaiza
authors.initials: Y
authors.lastname: Lopiz
authors.forename: Carlos
authors.initials: C
authors.lastname: García-Fernández
authors.forename: Fernando
authors.initials: F
authors.lastname: Marco
authors.forename: Luis
authors.initials: L
authors.lastname: López-Durán
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation* / Q000379:methods; D005260:Female; D006801:Humans; D031221:Knee Dislocation / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000601:surgery; D007720:Knee Prosthesis; D007796:Laminectomy; D008279:Magnetic Resonance Imaging; D008577:Meningeal Neoplasms / Q000150:complications* / Q000473:pathology / Q000601:surgery; D008579:Meningioma / Q000150:complications* / Q000473:pathology / Q000601:surgery; D020370:Osteoarthritis, Knee / Q000601:surgery; D011475:Prosthesis Failure; D011859:Radiography; D012008:Recurrence; D012086:Reoperation; D016896:Treatment Outcome