{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,13]],"date-time":"2026-01-13T06:17:17Z","timestamp":1768285037151,"version":"3.49.0"},"reference-count":26,"publisher":"British Editorial Society of Bone & Joint Surgery","issue":"3","license":[{"start":{"date-parts":[[2012,3,1]],"date-time":"2012-03-01T00:00:00Z","timestamp":1330560000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/online.boneandjoint.org.uk\/TDM"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["The Journal of Bone and Joint Surgery. British volume"],"published-print":{"date-parts":[[2012,3]]},"abstract":"<jats:p>In skeletally immature patients, resection of bone tumours and reconstruction of the lower limb often results in leg-length discrepancy. The Stanmore non-invasive extendible endoprosthesis, which uses electromagnetic induction, allows post-operative lengthening without anaesthesia. Between 2002 and 2009, 55 children with a mean age of 11.4 years (5\u00a0to 16) underwent reconstruction with this prosthesis; ten patients (18.2%) died of disseminated disease and one child underwent amputation due to infection. We reviewed 44 patients after a mean follow-up of 41.2 months (22 to 104). The mean Musculoskeletal Tumor Society score was 24.7 (8 to 30) and the Toronto Extremity Salvage score was 92.3% (55.2% to 99.0%). There was no local recurrence of tumour. Complications developed in 16 patients (29.1%) and ten (18.2%) underwent revision.<\/jats:p><jats:p>The mean length gained per patient was 38.6\u00a0mm (3.5 to 161.5), requiring a mean of 11.3\u00a0extensions (1 to 40), and ten component exchanges were performed in nine patients (16.4%) after attaining the maximum lengthening capacity of the implant. There were 11\u00a0patients (20%) who were skeletally mature at follow-up, ten of whom had equal leg lengths and nine had a full range of movement of the hip and knee.<\/jats:p><jats:p>This is the largest reported series using non-invasive extendible endoprostheses after excision of primary bone tumours in skeletally immature patients. The technique produces a good functional outcome, with prevention of limb-length discrepancy at skeletal maturity.<\/jats:p>","DOI":"10.1302\/0301-620x.94b3.27738","type":"journal-article","created":{"date-parts":[[2012,2,27]],"date-time":"2012-02-27T17:31:59Z","timestamp":1330363919000},"page":"425-430","source":"Crossref","is-referenced-by-count":56,"title":["The medium-term results of the Stanmore non-invasive extendible endoprosthesis in the treatment of paediatric bone tumours"],"prefix":"10.1302","volume":"94-B","author":[{"given":"N. 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