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Since scoliosis in these patients is caused by a neurologic disease, we based our decision to stop at L5 on the presence of spasticity or flaccidity.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Patients &amp; Methods<\/jats:title>\n                <jats:p>The senior author did 109 primary fusions in NMS. Of those with DMD or SMA only 16% were instrumented to the ilium. The main factor for our decision was the correction potential of the truncal shift and PO in the supine traction radiographs and the absence of severe spasticity.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>The 57 patients with DMD\/SMA had a mean preoperative curvature of 68\u00b0, PO of 17\u00b0, and truncal shift of 20\u00b0. 74% should have been instrumented to the pelvis, but only 16% were. Those instrumented shorter as the rule, were corrected from 74\u00b0 to 26\u00b0 and had a postoperative PO of 8\u00b0. There was no significant difference in postoperative correction and PO compared to those instrumented to L5 on standard protocol. Subsequent extension to the pelvis was needed in 1 CP patient. There were no significant changes after 2\u00a0years. Of the 20 patients\u00a0instrumented to the pelvis 11 had cerebral palsy and a preop curvature of 89\u00b0, a PO of 21\u00b0 and a truncal shift of 25\u00b0.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Discussion<\/jats:title>\n                <jats:p>The decision on instrumentation length should take flexibility and disease into consideration. If the trunk is centred over the pelvis, deterioration will not occur in absence of spasticity.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00586-023-07943-7","type":"journal-article","created":{"date-parts":[[2023,9,26]],"date-time":"2023-09-26T08:04:04Z","timestamp":1695715444000},"page":"4063-4072","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["The indication of fusion to the pelvis in neuromuscular scoliosis is based on the underlying disease rather than on pelvic obliquity"],"prefix":"10.1007","volume":"32","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6976-5891","authenticated-orcid":false,"given":"Florian","family":"Geiger","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Johanna","family":"Eberl","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andr\u00e9","family":"Wirries","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andreas","family":"Forth","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ahmed","family":"Hammad","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2023,9,26]]},"reference":[{"key":"7943_CR1","doi-asserted-by":"publisher","first-page":"752","DOI":"10.1097\/01241398-199311000-00012","volume":"13","author":"SJ Mubarak","year":"1993","unstructured":"Mubarak SJ, Morin WD, Leach J (1993) Spinal fusion in Duchenne muscular dystrophy: fixation and fusion to the sacropelvis? 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