Objective. To compare the radiological and clinical outcomes following three different techniques used in the correction of Scheuermann's kyphosis. Materials and Methods. Twenty three patients with comparable preoperative radiographic and physical variables (age, gender, height, weight, body mass index) underwent correction of thoracic kyphotic deformity using three different surgical methods. Group A (n=8) had combined anterior and posterior fusion with instrumentation using morselised rib graft. Group B (n=7) had combined anterior and posterior fusion with instrumentation using titanium interbody cages. Group C (n=8) had posterior segmental pedicle screw fixation only. All groups had posterior apical multi-level chevron osteotomy and posterior instrumentation extending from T2 to L2/3. Preoperative and postoperative curve morphometry studied on plain radiographs included Cobb angle, sagittal vertical axis (SVA), sacral inclination (SI) and lumbar lordosis (LL). Preoperative and postoperative questionnaires including ODI, VAS and SRS-22 were also analysed. Results. The average follow-up was 70 months for group A, 66 months for group B and 35 months for group C. For the whole cohort, the preoperative median cobb angle for thoracic Kyphosis was 88.4°, SVA +3.5 centimeters (cms), lumbar lordosis was 66 °, and the median sacral inclination angle was 40°. The average immediate postoperative cobb angle for thoracic kyphosis was 42°, SVA -1.5 cms, lumbar lordosis 45 ° and sacral inclination angle was 30°. At follow-up, the average cobb angle for thoracic kyphosis was 42.0°, SVA +1 cm, lumbar lordosis 42.0 ° and sacral inclination angle was 22.0 °. There was a significant difference between preoperative and postoperative measurements in all three groups, indicating that good correction and satisfaction was achieved. Three patients had distal junctional Kyphosis in early cases. There was no significant difference obtained in the final cobb angle between group A, group B and group C. All three groups retained the postoperative correction with respect to thoracic kyphosis, and changes in ODI and SRS-22 scores were similar in three groups. Conclusion. In all groups the SVA became negative following correction and at long-term follow-up it was observed to return towards normal physiological limits. The compensatory lumbar curve reduces and this was associated with a decrease in sacral inclination. This method of compensation, without causing junctional kyphosis, has not previously been reported. We were unable to demonstrate a significant difference between the three groups with regards to the clinical outcome, the degree of initial correction, loss of correction and complications. Therefore, in conclusion, we believe a single stage posterior correction and segmental instrumentation not only provides the same clinical and radiological outcomes, but also reduces blood loss, operative time and hospital stay. Ethics approval: None. Interest Statement: None

Introduction:. Scheuermann's kyphosis is a fixed round back deformity characterised by wedged vertebrae seen on radiograph. It is known patients presented with a negative sagittal balance before operation. Few studies investigated the outcome after operation, especially the change in the lumbar hyperlordosis. Aim:. To investigate the change in sagittal profile after correction surgery. Method:. This is a retrospective review of cases from 2001 to 2012. Our centre uses a posterior, four rod cantilever reduction technique for all Scheuermann's Kyphosis correction. 36 cases are identified. They include 24 males and 12 females with an average age of 20 and follow up of 27 months. First 8 cases used the stainless steel hybrid implants. The remaining 28 had titanium all pedicle screw system. All had intra-operative spinal cord monitoring. Results:. The target of thoracic kyphosis correction is around the accepted upper end of normal limit (40°). The average thoracic kyphosis Cobb angle was 78.5°. The immediate post-op angle was 43.2° and at final follow up, 43.6°. The average lumbar lordosis changed from 65.7° pre-op to 48.8° post-op, which is now bigger than the thoracic kyphosis. The result is the transfer of average sagittal balance (C7 plumb line) from −2.2 cm to −3.5 cm, which remains posterior to the posterior corner of S1 after the surgery. Discussion:. Surgery can improve the roundback deformity but not the overall sagittal profile. We have no explanation to this phenomenon. This could imply the pathology of Scheuermann's Kyphosis involves the whole spine, not just the wedging thoracic segment. Conflict Of Interest Statement: No conflict of interest

The current trend in kyphosis correction is for “every level” instrumentation to achieve intraoperative stability, correction, fusion and implant longevity. We evaluate the medium term follow up of a low implant density (LID) construct. All patients with adolescent kyphosis (idiopathic or Scheurmann's) on our deformity database were identified. Radiographs and records were analysed for neurological complications, correction and revision. The constructs included were all pedicle screw anchors with multiple apical chevron osteotomies and a proximal and distal “box” of 6 to 8 screws. A four rod cantilever reduction manoeuvre with side to side connectors completed the construct. Kyphosis for any other cause was excluded. Follow up less than 12 months was excluded. 23 patients were identified with an average follow up 27 months (72 to 12 months) and a mean implant density of 1.1 (53.5% of “available” pedicles instrumented). There was 1 false positive neurophysiological event without sequelae (4%). There were no proximal junctional failures (0%). There were no pseudarthroses or rod breakages (0%). There was 1 loss of distal rod capture (early set screw failure) (4%). This was revised uneventfully. There were 4 infections requiring debridement (early series). Average initial correction was 44% (77.7 degrees to 43.5 degrees) with a 1% loss of correction at final follow up (43.5 to 44.0 degrees). The fulcrum bending correction index was 107% (based on fulcrum extension radiographs). 85% of curves had a fulcrum flexibility of less than 50%. The average cost saving compared to “every level “instrumentation was £5700 per case. This paper shows that a LID construct for kyphosis has technical outcomes as good as high density constructs. The obvious limitation of the study is the small number of patients in the cohort. The infection rates have improved with changes to perioperative process in the later series of patients. We do not believe these are a consequence of the construct itself

Neural axis anomalies in idiopathic scoliosis (AIS) are well documented, with prevalence of 7% in adolescents; 20% in early-onset and up to 40% in congenital, the case for pre-operative MRI of brainstem to sacrum is well made in these groups. SK is rarer than AIS and the prevalence of anomalies is not defined. The case for routine MRI scan is unclear. A recent report concluded that routine MRI was not indicated, although this was based on only 23 MRI scans in 85 patients. At our institution all patients are undergo whole spine MRI following a diagnosis of SK. We aimed to assess the incidence of significant neural anomalies in Scheuermann's Kyphosis. Using a keyword search for “Scheuermann”, we reviewed all SK patients' MRI reports over the past 6 years. 117 MRI scans were identified. 13 patients did not fulfil the radiological criteria for SK and thus 104 (73M: 31F) scans were reviewed. 14 (13%) of 104 scans showed unexpected Significant abnormal findings. There were 8 (8%) with neural axis anomalies: 4 syrinxes; 1 cord anomaly; 2 cerebellar descents and 1 cerebellar tumour. All these patients had normal neurological examination except one with examination consistent with a known diagnosis of Parkinson's. A further 6 patients had non-neural anomalies. The presence of neural axis anomalies may influence the management of a patient with SK. Neurological compromise during correction is higher in patients with neural axis anomalies and this risk can often be partially mitigated by a preceding neurosurgical procedure (such as foramen magnum decompression or shunt). Furthermore it is well described that these anomalies often occur in patients who demonstrate a normal neurological examination. This study confirms this. Given that MRI is widely available and considering the devastating life implications of neurological injury, we advise pre-operative MRI scan in all SK patents

Aims

To report the outcome of spinal deformity correction through anterior spinal fusion in wheelchair-bound patients with myelomeningocele.

Aims

To describe the clinical, radiological, and functional outcomes in patients with isolated congenital thoracolumbar kyphosis who were treated with three-column osteotomy by posterior-only approach.

Aims

Whether a combined anteroposterior fusion or a posterior-only fusion is more effective in the management of patients with Scheuermann’s kyphosis remains controversial. The aim of this study was to compare the radiological and clinical outcomes of these surgical approaches, and to evaluate the postoperative complications with the hypothesis that proximal junctional kyphosis would be more common in one-stage posterior-only fusion.

We determined the frequency, rate and extent of development of scoliosis (coronal plane deformity) in wheelchair-dependent patients with Duchenne muscular dystrophy (DMD) who were not receiving steroid treatment. We also assessed kyphosis and lordosis (sagittal plane deformity). The extent of scoliosis was assessed on sitting anteroposterior (AP) spinal radiographs in 88 consecutive non-ambulatory patients with DMD. Radiographs were studied from the time the patients became wheelchair-dependent until the time of spinal fusion, or the latest assessment if surgery was not undertaken. Progression was estimated using a longitudinal mixed-model regression analysis to handle repeated measurements.

Scoliosis ≥ 10° occurred in 85 of 88 patients (97%), ≥ 20° in 78 of 88 (89%) and ≥ 30° in 66 of 88 patients (75%). The fitted longitudinal model revealed that time in a wheelchair was a highly significant predictor of the magnitude of the curve, independent of the age of the patient (p <  0.001). Scoliosis developed in virtually all DMD patients not receiving steroids once they became wheelchair-dependent, and the degree of deformity deteriorated over time.

In general, scoliosis increased at a constant rate, beginning at the time of wheelchair-dependency (p < 0.001). In some there was no scoliosis for as long as three years after dependency, but scoliosis then developed and increased at a constant rate. Some patients showed a rapid increase in the rate of progression of the curve after a few years – the clinical phenomenon of a rapidly collapsing curve over a few months.

A sagittal plane kyphotic deformity was seen in 37 of 60 patients (62%) with appropriate radiographs, with 23 (38%) showing lumbar lordosis (16 (27%) abnormal and seven (11%) normal).

This study provides a baseline to assess the effects of steroids and other forms of treatment on the natural history of scoliosis in patients with DMD, and an approach to assessing spinal deformity in the coronal and sagittal planes in wheelchair-dependent patients with other neuromuscular disorders.

Cite this article: Bone Joint J 2014;96-B:100–5.

We analysed the cases of lumbar kyphosis in 151 (21%) of a series of 719 patients with myelomeningocele. Three different types were distinguished: paralytic, sharp-angled and congenital. In a cross-sectional and partly longitudinal study the size and magnitude of the kyphosis, the apex of the curve and the level of paralysis of each group were recorded and statistically analysed.

Paralytic kyphosis (less than 90° at birth) occurred in 44.4% and increased linearly during further development. Sharp-angled kyphosis (90° or more at birth) was present in 38.4% and also showed a linear progression. In both types, progression seemed to depend also on the level of paralysis. Congenital kyphosis occurred in 13.9% and we could find no significant factor which correlated with progression.

Introduction

Spinal deformations are a deviation of the natural arrangement of forces during growth. Environmental factors play a part in these deviations. The presence of lordosis in the thoracic spine is a causative factor in spinal deformations that needs to be addressed. Most biomechanical models of bracing have a scientific background. Has older knowledge lost its value? In living structures, all processes such as regulation of equilibrium in posture and movement use Newton's law and extended laws of Hooke for conservation of energy, momentum, and angular momentum under control of the central nervous system. Form follows function (phylogenetic and ontogenetic) in the spine as primary engine in movement in animals. The change in function in bipedals is that the coupling mechanism at the thoracolumbar joint now couples a reversed pendulum.

The purpose was to investigate back pain and disability and their relationship to vertebral changes in patients with untreated Scheuermann's.

Overall, 136 patients who had attended the outpatient clinics between 1950 and 1990 for Scheuermann's were contacted, 49 of them (12 females, 37 males) responded. There was no difference in the baseline data between responders and non-responders. From radiographs, th-kyphosis, l-lordosis, and scoliosis were measured. The number of affected vertebrae and the degree of wedging were registered. Anthropometric data, occurrence of back pain, disability scores, and employment status were compared to a representative sample (n=3835) of the normal population.

After mean follow-up of 37 (6.5;25.9-53.7) y, their average age was 58.8 (8.2;44.4.-79.3) y. Male patients were significantly taller than the control subjects. Female patients were on average 6 kg heavier (P=0.016) and their mean BMI was higher (23.9 kg/m² vs 20.8 kg/m²,P=0.001) at age 20 than in the controls.

Females had a greater mean kyphosis than males (51.7 vs. 43.2°, p=0.11). There was no correlation between the degree of thoracic kyphosis and disability. Scheuermann's patients had an increased risk for constant back pain (P=0.003), a 2.6-fold risk for disability because of back pain during the past 5 years (P=0.002), a 3.7-fold risk for back pain during the past 30 days (P<0.001), and a 2.3-fold risk for sciatic pain (P=0.005). They reported a poorer quality of life (p<0.001) and general health (p<0.001). There was no difference in working ability and employment status between patients and controls.

Purpose of the study

Two patients with very severe thoracolumbar Scheuermann's kyphosis who developed spontaneous bony fusion across the apex of the deformity are presented and their treatment, as well as surgical outcome is discussed.

Purpose of the study

We report septic shock as postoperative complication following an instrumented posterior spinal arthrodesis on a patient with multiple body piercings. The management of this potentially catastrophic complication and outcome of treatment is been discussed.

Objective

To determine if there is a differing effect between two spinal implant systems on sagittal balance and thoracic kyphosis in adolescent idiopathic scoliosis.

Introduction

We aimed to determine the midterm effect of pedicle screw instrumentation on sagittal plane alignment, compared with a hybrid alignment, in the treatment of thoracic adolescent idiopathic scoliosis (AIS).

We describe the prevalence of spondylolisthesis in Scheuermann's Kyphosis (SK) from retrospective review of 104 SK patients over 6 years. All patients referred to our institution for symptomatic SK undergo MRI scan from hindbrain to sacrum. Our MRI database was reviewed for all SK patients. All scans with spondylolisthesis were re-analysed. 117 scans were identified, 13 patients did not fulfil the MRI criteria for SK and thus 104 (74M: 31F) scans of SK are reported. There were 5 spondylolisthesis (1 cervical and 4 lumbosacral). Of the 4 lumbosacral there were 2 Meyerding grade-1; 1 grade-2 and 1 grade-5 spondyloptosis). An overall rate of 5% for listhesis was therefore found. The prevalence of spondylolisthesis is around 3% in the general population based on a CT study of 510 patients (Belfi 2006) and Fredrickson's (1984 and 2003) prospective study of 500 children. We describe the prevalence in SK patients being higher at 5%. This may be related to the adaptive change of increased lumbar lordosis in SK, certainly it supports the previous description higher rates of spondylolysis in SK

Aim:. To establish whether there is a direct relationship between pelvic morphology and lumbar segmental angulation in the sagittal plane. Methods:. 40 lateral whole spine radiographs with normal sagittal profiles were reviewed. Pelvic incidence (PI), Lumbar Lordosis (LL), Thoracic Kyphosis (TK) and segmental angulation at each level from L1 to the sacrum were measured (from endplate to endplate) distinguishing the vertebral body and intervertebral disc contribution. Pearson correlation coefficients were used to analyse any relationship between pelvic parameters and segmental angulation. Results:. A strong correlation was found between pelvic incidence and total lumbar lordosis and angulation at cephalad lumbar segments (L12, L23 and L34) P<0.0001 with the increased lordosis primarily (four fifths on average) found at the intervertebral disc. The proportion of total lumbar lordosis contributed at L45 and L5S1 reduced as pelvic incidence increased (P<0.0001). Discussion:. PI can predict segmental angulation. Although the majority of lumbar lordosis is produced at L45 and L5S1, cephalad-lumbar segments sequentially become increasingly important as PI increases. This describes a continuum that allows segmental abnormalities to be identified when compensation in adjacent segments maintains normal total LL. It also paves the way for anatomical reconstruction in degenerative adult deformity based on pelvic morphology. Conflict Of Interest Statement: No conflict of interest

Aim:. To compare the degree of deformity correction achieved using cobalt chromium versus titanium alloy rods in patients with Adolescent Idiopathic Scoliosis. Method:. A retrospective comparison of two cohorts of patients with Adolescent Idiopathic Scoliosis treated with posterior segmental pedicle screw fixation using either Titanium or Cobalt Chromium rods. The radiographs of 50 patients treated before 2009 (Ti group) and 50 patients after 2009 (CoCr group) were reviewed for changes in: Main Coronal Curvature Sagittal Balance (C7 Plumb Line) Kyphosis (T5-12). Results:. Thirteen were excluded because of incomplete radiographs. 38 patients received CoCr, 45 Ti and 4 patients received hybrid constructs. Correction rate of curves measuring >50 was significantly improved with CoCr (81% vs 69%, p=0.02). Sagittal balance was improved in both groups (CoCr 27.8, Ti 28.0 mm) but no significant difference was seen (p=0.84). Within the Ti group 12 patients moved for normal kyphosis (20–40) to abnormal (<20, >40) while 9 patients moved from abnormal to normal (p=0.66). Within the CoCr Group 10 patients were normalised while only 2 patients moved from normal to abnormal (p=0.04). Mean change in kyphosis showed a trend towards improved correction with CoCr (4.2 vs 2.9) but failed to reach significance (p=0.62). Discussion:. We have demonstrated that CoCr rods significantly improve coronal correction in patient with >50 curves. No difference in overall sagittal balance was seen between metal alloys. There is a trend towards better restoration of T5-12 kyphosis with CoCr however it is unclear if this small difference is clinically relevant. Conflict Of Interest Statement: No conflict of interest

Aims

To report the surgical outcome of patients with severe Scheuermann’s kyphosis treated using a consistent technique and perioperative management.

Purpose. To report the results of full vertebral column resection (VCR) for paediatric spinal deformity. Methods and Results. All VCR (n=47) for paediatric spinal deformity were retrospectively evaluated from four university hospitals performing these procedures in Finland between 2005 and 2010. After excluding single hemivertebra (n=25) and resections performed for patients with MMC (n=6), 16 patients with full VCR (mean age at surgery 12.9 yrs [6.5-17.9] AIS 1; NMS 3; Congenital scoliosis 3 primary, revision 4; Kyphosis congenital 2, global 2; NF1 scoliosis 1) were identified. Seven procedures were performed anteroposteriorly and nine posterior-only. Mean follow-up time 1.9 (0.6–5.5) years. Major Curve (MC) averaged preoperatively 85 (58–120) degrees, 31 (14-53) degrees at 6 months, and 37 (17-80) degrees at 2-year follow-up. MC correction averaged 61 (46-86)% in the AP and 64 (57-83)% in the PL group at 6 months and 54 (18-86)% and 60 (41-70)% at 2-yr FU, respectively (NS). Blood loss averaged 3400 (500-8200) mL (NS between groups). The mean SRS-24 total scores were 100 (92-108) for AP and 102 (95-105) for PL group. There was one paraparesis in the AP group necessitating urgent re-decompression with full recovery. One peripheral L5 motor deficit resolved fully within few days (PL). Two junctional kyphosis were observed (one in both group). One one-sided partial lower instrumentation pull-out was observed without need for revision. One pseudoarthrosis occurred in AP group needing revision. Conclusions. Full VCR is rarely needed for paediatric spinal deformity with an estimated incidence of 2.9/million/year. Posterior VCR allows better control of neural elements during deformity correction