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The prosthesis was lengthened at appropriate intervals in outpatient clinics, without anaesthesia, using the principle of electromagnetic induction. The patients were functionally evaluated using the Musculoskeletal Tumour Society scoring system. The mean follow-up was 20.2 months (14 to 30). The prostheses were lengthened by a mean of 25 mm (4.25 to 55) and maintained a mean knee flexion of 110\u00b0 (100\u00b0 to 120\u00b0). The mean Musculoskeletal Tumour Society score was 68% (11 to 29). Complications developed in two patients; one developed a flexion deformity of 25\u00b0 at the knee joint, which was subsequently overcome and one died of disseminated disease. The early results from patients treated with this device have been encouraging. The implant avoids multiple surgical procedures, general anaesthesia and assists in maintaining leg-length equality. <\/jats:p>","DOI":"10.1302\/0301-620x.88b5.17098","type":"journal-article","created":{"date-parts":[[2006,4,27]],"date-time":"2006-04-27T19:28:13Z","timestamp":1146166093000},"page":"649-654","source":"Crossref","is-referenced-by-count":88,"title":["Non-invasive distal femoral expandable endoprosthesis for limb-salvage surgery in paediatric tumours"],"prefix":"10.1302","volume":"88-B","author":[{"given":"A.","family":"Gupta","sequence":"first","affiliation":[{"name":"Department of Orthopaedic Oncology, The Royal National Orthopaedic Hospital NHS Trust, Stanmore, Middlesex HA7 4LP, UK."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J.","family":"Meswania","sequence":"additional","affiliation":[{"name":"Department of Biomedical Engineering, Institute of Orthopaedics and Musculoskeletal Sciences, University College London, Gower Street, London WC1E 6BT, UK."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R.","family":"Pollock","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Oncology, The Royal National Orthopaedic Hospital NHS Trust, Stanmore, Middlesex HA7 4LP, UK."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S. 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