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Safety and Efficacy of Apical Resection Following Growth-friendly Instrumentation in Myelomeningocele Patients With Gibbus: Growing Rod Versus Luque Trolley.
Journal of Pediatric Orthopedics 2015 December
INTRODUCTION: Thoracolumbar/lumbar kyphosis in myelomeningocele patients is a common and severely debilitating condition, amenable only to surgical correction. Several surgical techniques have been proposed. Growth-friendly techniques should be preferred in this patient population due to an already compromised trunk height. The growing rod (GR) and Luque trolley (LT) with Galveston instrumentation are well-known growth-friendly techniques. We compared results and complications in 2 groups of patients who have undergone kyphectomy and fixation, either with the GR (group 1) or the LT with Galveston pelvic fixation (group 2).
METHODS: Ten patients undergoing GR fixation and 5 patients undergoing LT with Fackler fixation following kyphectomy (vertebral column resection or multiple eggshell) were included. GRs were lengthened every 6 months. Unplanned surgery in group 1 was defined as an unscheduled operation due to complication; all subsequent operations in group 2 were considered unplanned. Thoracic and local kyphosis and T1-S1 and T1-12 heights were measured preoperatively, postoperatively, and at final follow-up.
RESULTS: Mean age at initial surgery was 6 years and 6.5 years for groups 1 and 2, respectively. Mean age at the last follow-up was 12.5 years for group 1 and 13.1 years for group 2. Mean follow-up was 72.7 months for group 1 and 68.6 months for group 2. Preoperative, postoperative, and final follow-up kyphosis angles in that order for group 1 were 72.3 degrees (10 to 110 degrees), 16.9 degrees (-50 to +55 degrees), and 21.6 degrees (-41 to +97 degrees), and for group 2 106.6 degrees (81 to 132 degrees), 15.6 degrees (-37 to +50 degrees), and 19.2 degrees (-42 to +38 degrees), respectively. Postoperative and final follow-up in that order for mean T1-T12 and T1-S1 heights for group 1 were 14 (11.2 to 18.7) cm, 20.4 (19.3 to 25.7) cm and 21 (17.2 to 23.2) cm, 31.6 (23.6 to 41.5) cm. Postoperative and final follow-up in that order for mean T1-T12 and T1-S1 heights for group 2 were 15.9 (14.3 to 19.7) cm, 20.1 (15.5 to 24.6) cm and 24.4 (17.7 to 27.8) cm, 29.5 (25.3 to 31.3) cm. Growth per year was 1.05 and 0.84 cm for groups 1 and 2, respectively (P=0.297). Fourteen versus 4 unplanned surgeries were performed in groups 1 and 2, respectively, and an additional 4 implant revisions were performed in group 1 during planned lengthenings.
CONCLUSIONS: Both the LT and the GR system are reasonable alternatives of fixation postkyphectomy, both of which preserve growth to differing degrees. In this patient population with an already severely stunted trunk height, the surgeon must choose whether the amount of extra growth achieved by the GR is worth the risk of an increased number of surgeries.
METHODS: Ten patients undergoing GR fixation and 5 patients undergoing LT with Fackler fixation following kyphectomy (vertebral column resection or multiple eggshell) were included. GRs were lengthened every 6 months. Unplanned surgery in group 1 was defined as an unscheduled operation due to complication; all subsequent operations in group 2 were considered unplanned. Thoracic and local kyphosis and T1-S1 and T1-12 heights were measured preoperatively, postoperatively, and at final follow-up.
RESULTS: Mean age at initial surgery was 6 years and 6.5 years for groups 1 and 2, respectively. Mean age at the last follow-up was 12.5 years for group 1 and 13.1 years for group 2. Mean follow-up was 72.7 months for group 1 and 68.6 months for group 2. Preoperative, postoperative, and final follow-up kyphosis angles in that order for group 1 were 72.3 degrees (10 to 110 degrees), 16.9 degrees (-50 to +55 degrees), and 21.6 degrees (-41 to +97 degrees), and for group 2 106.6 degrees (81 to 132 degrees), 15.6 degrees (-37 to +50 degrees), and 19.2 degrees (-42 to +38 degrees), respectively. Postoperative and final follow-up in that order for mean T1-T12 and T1-S1 heights for group 1 were 14 (11.2 to 18.7) cm, 20.4 (19.3 to 25.7) cm and 21 (17.2 to 23.2) cm, 31.6 (23.6 to 41.5) cm. Postoperative and final follow-up in that order for mean T1-T12 and T1-S1 heights for group 2 were 15.9 (14.3 to 19.7) cm, 20.1 (15.5 to 24.6) cm and 24.4 (17.7 to 27.8) cm, 29.5 (25.3 to 31.3) cm. Growth per year was 1.05 and 0.84 cm for groups 1 and 2, respectively (P=0.297). Fourteen versus 4 unplanned surgeries were performed in groups 1 and 2, respectively, and an additional 4 implant revisions were performed in group 1 during planned lengthenings.
CONCLUSIONS: Both the LT and the GR system are reasonable alternatives of fixation postkyphectomy, both of which preserve growth to differing degrees. In this patient population with an already severely stunted trunk height, the surgeon must choose whether the amount of extra growth achieved by the GR is worth the risk of an increased number of surgeries.
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