Anterior instrumentation surgery for the treatment of Lenke type 1AR curve patterns

2021 ◽  
pp. 1-8
Author(s):  
Satoshi Inami ◽  
Hiroshi Moridaira ◽  
Daisaku Takeuchi ◽  
Tsuyoshi Sorimachi ◽  
Haruki Ueda ◽  
...  

OBJECTIVE Previous studies have demonstrated that Lenke lumbar modifier A contains 2 distinct types (AR and AL), and the AR curve pattern is likely to develop adding-on (i.e., a progressive increase in the number of vertebrae included within the primary curve distally after posterior surgery). However, the results of anterior surgery are unknown. The purpose of this study was to present the surgical results in a cohort of patients undergoing scoliosis treatment for type 1AR curves and to compare anterior and posterior surgeries to consider the ideal indications and advantages of anterior surgery for type 1AR curves. METHODS Patients with a Lenke type 1 or 2 and lumbar modifier AR (L4 vertebral tilt to the right) and a minimum 2-year postoperative follow-up were included. The incidence of adding-on and radiographic data were compared between the anterior and posterior surgery groups. The numbers of levels between the end, stable, neutral, and last touching vertebra to the lower instrumented vertebra (LIV) were also evaluated. RESULTS Forty-four patients with a mean follow-up of 57 months were included. There were 14 patients in the anterior group and 30 patients in the posterior group. The main thoracic Cobb angle was not significantly different between the groups preoperatively and at final follow-up. At final follow-up, the anterior group had significantly less tilting of the LIV than the posterior group (−0.8° ± 4.5° vs 3° ± 4°). Distal adding-on was observed in no patient in the anterior group and in 6 patients in the posterior group at final follow-up (p = 0.025). In the anterior group, no LIV was set below the end vertebra, and all LIVs were set above last touching vertebra. The LIV was significantly more proximal in the anterior group than in the posterior surgery patients without adding-on for all reference vertebrae (p < 0.001). CONCLUSIONS This is the first study to investigate the surgical results of anterior surgery for Lenke type 1AR curve patterns, and it showed that anterior surgery for the curves could minimize the distal extent of the instrumented fusion without adding-on. This would leave more mobile disc space below the fusion.

Author(s):  
Rahul Varshney ◽  
Parthasarathi Datta ◽  
Pulak Deb ◽  
Santanu Ghosh

Abstract Objective The aim of this article was to analyze the clinical and radiological outcomes of transpedicular decompression (posterior approach) and anterolateral approach in patients with traumatic thoracolumbar spinal injuries. Methods  It was a prospective study of patients with fractures of dorsolumbar spine from December 2011 to December 2013. A total of 60 patients with traumatic spinal injuries were admitted during the study period (December 2011–2013), of which 51 cases were finally selected and taken for operations while 3 were eventually lost in follow-up. Twenty patients were operated by anterolateral approach, titanium mesh cage, and fixation with bicortical screws. Twenty-eight patients were treated with posterior approach and transpedicular screw fixation. Clinical and radiographic evaluations were performed on all 48 patients before and after surgery. Results There were 48 patients of thoracolumbar burst fractures with 40 male and 8 female patients. Range of follow-up was from 1 month to 20 months, with a mean of 7.4. Preoperatively in anterior group, 65% of the patients were bed ridden, 20% patients were able to walk with support, and 15% of the patients were able to walk without support. In posterior group, 78.57% patients were bed ridden, 10.71% were able to walk with support, and 10.71% patients were able to walk without support. Kyphotic angle changes were seen in 16 patients out of 18 in anterior group and 20 patients in posterior group out of 25. Out of 18 patients in anterior group, 14 showed reduction in kyphotic angle of 10 to 100 (improvement), with mean improvement of 4.070. In posterior group, 7 patients showed improvement of 10 to 80 (reduction in kyphotic angle) whereas 13 patients showed deterioration of 1 to 120. The mean improvement was 2.140 in 7 patients and mean deterioration was 4.920. No statistical difference was found (p > 0.05) regarding improvement in urinary incontinence during the follow-up period. Conclusion There are significant differences in anterior and posterior approaches in terms of clinical improvement. Compared with posterior approach, the anterolateral approach can reduce fusion segment and well maintain the kyphosis correction. The selection of treatment should be based on clinical and radiological findings, including neurological deficit.


2008 ◽  
Vol 109 (Supplement) ◽  
pp. 185-189 ◽  
Author(s):  
Shinji Matsuda ◽  
Toru Serizawa ◽  
Osamu Nagano ◽  
Junichi Ono

Object Gamma Knife surgery (GKS) is an effective treatment for intractable trigeminal neuralgia (TN). The authors compared results using two major GKS target points, the dorsal root entry zone and the retrogasserian portion, in a series of patients with intractable TN. Methods One hundred patients with medically refractory TN underwent GKS between August 1998 and December 2007. Thirty-seven were men, and 63 were women. The median age at GKS was 74 years. With a single isocenter and use of a 4mm collimator, 51 patients received 80 Gy at the proximal trigeminal nerve (posterior group) and 7 patients received 80 Gy, 1 patient received 85 Gy, and 41 patients received 90 Gy at the retrogasserian portion (anterior group). Follow-up was obtained by clinic visits every 3–6 months after GKS. Data on pain control, complications, and pain recurrence were recorded. The relationships between pain control status, complications, recurrence, and the target portions (anterior vs posterior) were analyzed. Results The median duration of follow-up was 30 months (range 3–88 months). Initially, 87 patients achieved pain-free status and 64 achieved complete remission. At the final follow-up visit, 68 patients were still in pain-free status and 42 were in complete remission. Recurrence of facial pain occurred in 15 patients. Forty-one patients developed some degree of trigeminal dysfunction. The rate of initial complete remission was higher in the posterior group than in the anterior group (p = 0.003). More complications were observed in the anterior group than in the posterior group (p = 0.009). Conclusions The posterior targeting group had better pain control and a lower complication rate. The authors recommend the posterior targeting method and use of 80 Gy for treatment of TN with GKS.


2017 ◽  
Vol 26 (4) ◽  
pp. 466-473 ◽  
Author(s):  
Seiichi Odate ◽  
Jitsuhiko Shikata ◽  
Tsunemitsu Soeda ◽  
Satoru Yamamura ◽  
Shinji Kawaguchi

OBJECTIVE Ossification of the posterior longitudinal ligament (OPLL) is a progressive disease. An anterior cervical decompression and fusion (ACDF) procedure for cervical OPLL is theoretically feasible, as the lesion exists anteriorly; however, such a procedure is considered technically demanding and is associated with serious complications. Cervical laminoplasty is reportedly an effective alternative procedure with few complications; it is recognized as a comparatively safe procedure, and has been widely used as an initial surgery for cervical OPLL. After posterior surgery, some patients require revision surgery because of late neurological deterioration due to kyphotic changes in cervical alignment or OPLL progression. Here, the authors retrospectively investigated the surgical results and complications of revision ACDF after initial posterior surgery for OPLL. METHODS This was a single-center, retrospective study. Between 2006 and 2013, 19 consecutive patients with cervical OPLL who underwent revision ACDF at the authors' institution after initial posterior surgery were evaluated. The mean age at the time of revision ACDF was 66 ± 7 years (± SD; range 53–78 years). The mean interval between initial posterior surgery and revision ACDF was 63 ± 53 months (range 3–235 months). RESULTS The mean follow-up period after revision ACDF was 41 ± 26 months (range 24–108 months). Before revision ACDF, the mean maximum thickness of the ossified posterior longitudinal ligament was 7.2 ± 1.5 mm (range 5–10 mm), and the mean C2–7 angle was 1.3° ± 14° (range −40° to 24°). The K-line was plus (OPLL did not exceed the K-line) in 8 patients and minus in 11 (OPLL exceeded the K-line). The mean Japanese Orthopaedic Association score improved from 10 ± 3 (range 3–15) before revision ACDF to 11 ± 4 (range 4–15) at the last follow-up, and the mean improvement rate was 18% ± 18% (range 0%–60%). A total of 16 surgery-related complications developed in 12 patients (63%). The main complication was an intraoperative CSF leak in 8 patients (42%). Neurological function worsened in 5 patients (26%). The deterioration was due to spinal cord herniation through a defective dura mater in 1 patient, unidentified in 1 patient, and C-5 palsy that gradually recovered in 3 patients. Reintubation, delirium, and hoarseness were observed in 1 patient each (5%). No patient required reoperation for reconstruction failure, and all patients eventually had a solid bony fusion. CONCLUSIONS ACDF as revision surgery after initial posterior surgery for cervical myelopathy due to OPLL is associated with a high incidence of intraoperative CSF leakage and an extremely low improvement rate. The authors think that while the use of revision ACDF must be limited, it is indispensable in special cases, such as progressing myelopathy following posterior surgery due to a very large beak-type OPLL that exceeds the K-line. Postoperative OPLL progression and/or kyphotic changes can possibly cause later neurological deterioration. Fusion should be recommended at the initial surgery for many cases of cervical OPLL to prevent such a challenging revision surgery.


2017 ◽  
Vol 26 (2) ◽  
pp. 220-228 ◽  
Author(s):  
Abolfazl Rahimizadeh ◽  
Housain Soufiani ◽  
Valliolah Hassani ◽  
Ava Rahimizadeh

In this study the authors report the first example of spinal pseudarthrosis in a patient with ochronosis, and they describe the application of posterior-only 360° surgery as an alternative approach to combined anterior-posterior surgery in the management of pseudarthrosis of an ankylosed spine, regardless of its etiology. Spinal involvement in ochronosis produces loss of flexibility and ankylosis of thoracic and lumbar segments. Pseudarthrosis is a serious complication of the diseases that present with ankylosis of the spine. However, its occurrence in ochronotic spine has not been reported previously. Evaluation of progressive paraparesis in a 68-year-old man with ochronosis revealed pseudarthrosis at the T11–12 level. Circumferential dural sac decompression, debridement of the disc space, interbody fusion, and screw-rod fixation were all done via a posterior-only approach. Postoperatively the patient exhibited a marked recovery in terms of pain and neurological status. At the 3-month follow-up, he was able to walk independently. Ochronosis should be included in the etiology of pseudarthrosis. With aggravation of back pain and the appearance of neurological deficits in an already stable patient with any ankylosing disease, pseudarthrosis should be suspected. Furthermore, single-stage, 360°, posterior-only surgery may obviate the need for single-stage or staged anterior-posterior surgical intervention in patients with pseudarthrosis of the thoracic and lumbar spine.


2010 ◽  
Vol 28 (3) ◽  
pp. E15 ◽  
Author(s):  
Mario Cabraja ◽  
Alexander Abbushi ◽  
Daniel Koeppen ◽  
Stefan Kroppenstedt ◽  
Christian Woiciechowsky

Object A variety of anterior, posterior, and combined approaches exist to decompress the spinal cord, restore sagittal alignment, and avoid kyphosis, but the optimal surgical strategy remains controversial. The authors compared the anterior and posterior approach used to treat multilevel cervical spondylotic myelopathy (CSM), focusing on sagittal alignment and clinical outcome. Methods The authors studied 48 patients with CSM who underwent multilevel decompressive surgery using an anterior or posterior approach with instrumentation (24 patients in each group), depending on preoperative sagittal alignment and direction of spinal cord compression. In the anterior group, a 1–2-level corpectomy was followed by placement of an expandable titanium cage. In the posterior group, a multilevel laminectomy and posterior instrumentation using lateral mass screws was performed. Postoperative radiography and clinical examinations were performed after 1 week, 12 months, and at last follow-up (range 15–112 months, mean 33 months). The radiological outcome was evaluated using measurement of the cervical and segmental lordosis. Results Both the posterior multilevel laminectomy (with instrumentation) and the anterior cervical corpectomy (with instrumentation) improved clinical outcome. The anterior group had a significantly lower preoperative cervical and segmental lordosis than the posterior group. The cervical and segmental lordosis improved in the anterior group by 8.8 and 6.2°, respectively, and declined in the posterior group by 6.5 and 3.8°, respectively. The loss of correction was higher in the anterior than in the posterior group (−2.0 vs −0.7°, respectively) at last follow-up. Conclusions . These results demonstrate that both anterior and posterior decompression (with instrumentation) are effective procedures to improve the neurological outcome of patients with CSM. However, sagittal alignment may be better restored using the anterior approach, but harbors a higher rate of loss of correction. In cases involving a preexisting cervical kyphosis, an anterior or combined approach might be necessary to restore the lordotic cervical alignment.


2009 ◽  
Vol 10 (4) ◽  
pp. 347-356 ◽  
Author(s):  
Jay Jagannathan ◽  
Jonathan H. Sherman ◽  
Tom Szabo ◽  
Christopher I. Shaffrey ◽  
John A. Jane

Object This study details long-term clinical and radiographic outcomes following single-level posterior cervical foraminotomy for degenerative disc or osteophyte disease. Methods The authors conducted a retrospective review of 162 cases involving patients treated by a single surgeon using a posterior cervical foraminotomy. Inclusion criteria were a minimum of 5 years' clinical and radiographic follow-up and unilateral single-level posterior cervical foraminotomy for degenerative disease between C-3 and C-7. Patients who had undergone previous operations, those who underwent bilateral procedures, and those who underwent foraminotomy as part of a larger laminectomy were excluded. The Neck Disability Index (NDI) was used for clinical follow-up, and radiographic follow-up was performed using static and dynamic lateral radiographs to compare focal and segmental alignment and changes in disc-space height. Results The mean presenting NDI score was 18 (range 2–39). The most common presenting symptoms were radiculopathy (110 patients [68%]), neck pain (85 patients [52%]), and subjective weakness (91 patients [56%]). The mean preoperative focal angulation at the surgically treated level was 4.2° (median 4.1°, range 7.3–15.3°), and the mean preoperative segmental curvature between C-2 and C-7 was 18.0° (median 19.3°, range −22.1 to 39.3°). The mean postoperative NDI score was 8 (range 0–39). Improvement in NDI scores was seen in 150 patients (93%). Resolution of radiculopathy was experienced by 104 patients (95% of patients with radiculopathy). The mean radiographic follow-up was 77.3 months (range 60–177 months). No statistically significant changes in focal or segmental kyphosis or disc-space height were seen among the overall cohort with time (Cox proportional hazards analysis and Student t-test, p > 0.05). The mean postoperative focal angulation was 4.1° (median 3.9°, range −9.9° to 15.1°) and mean postoperative segmental angulation was 17.6° (median 15.4°, range −40.2 to 35.3°). Postoperative instability on dynamic imaging was present in 8 patients (4.9%); 7 of these patients were clinically asymptomatic and were treated conservatively, and 1 required cervical fusion. Postoperative loss of lordosis (defined as segmental Cobb angle < 10°) was seen in 30 patients (20%), 9 of whom had clinical symptoms and 4 of whom required further surgical correction. Factors associated with worsening sagittal alignment (Cox proportional hazards analysis, p < 0.05) included age > 60 at initial surgery, the presence of preoperative cervical lordosis of < 10°, and the need for posterior surgery after the initial foraminotomy Conclusions The posterior cervical foraminotomy is highly effective in treating patients with cervical radiculopathy and results in long-lasting pain relief and improved quality-of-life outcomes in most patients. Long-term radiographic follow-up shows no significant trend toward kyphosis, although select patient subsets (patients older than 60 years, patients who had previous posterior surgery, and patients with < 10° of lordosis preoperatively) appear to be at higher risk and require closer follow-up.


2006 ◽  
Vol 5 (2) ◽  
pp. 117-125 ◽  
Author(s):  
Patrick W. Hitchon ◽  
James Torner ◽  
Kurt M. Eichholz ◽  
Stephanie N. Beeler

Object The authors undertook a retrospective cohort study of patients with T11–L2 thoracolumbar burst fractures who underwent decompression and the placement of instrumentation via the anterolateral or posterior approach. Methods There were 63 thoracolumbar burst fractures in 45 male and 18 female patients. The instrumentation was placed posteriorly in 25 patients and anterolaterally in 38. The mean follow-up duration after discharge from the hospital was 1.8 years (range 6 months–8 years). The mean preoperative Frankel scores in the anterolateral and posterior groups were 3.7 ± 1.1 and 3.5 ± 1.4, respectively (p = 0.4155). Preoperative angular deformity in the anterolateral and posterior groups measured 11.9 ± 9.7 and 4.1 ± 7.1°, respectively (p = 0.0007). Postoperatively, angular deformity had been corrected to 2.0 ± 7.9 and 3.4 ± 7.5° in both groups, respectively (p = 0.565). The follow-up Frankel scores had improved to 4.2 ± 0.8 and 4.0 ± 1.4 (p = 0.461). At the latest follow-up examination, angular deformity had progressed to 4.5 ± 9.3° in the anterolateral group and to 9.8 ± 9.4° in the posterior group (p = 0.024). Although surgeons’ fees were significantly (p = 0.0024) higher for patients who underwent anterolateral procedures ($27,940 ± 4390) than for those who underwent posterior surgery ($18,270 ± 6980), there was no intergroup difference in total cost of hospitalization. Conclusions Rigid guidelines for the selection of anterior or posterior approaches are lacking. Evaluation of the authors’ results and those of others shows that angular deformity is more successfully corrected and maintained when the anterior approach is used.


2010 ◽  
Vol 13 (5) ◽  
pp. 612-621 ◽  
Author(s):  
Kenzo Uchida ◽  
Hideaki Nakajima ◽  
Takafumi Yayama ◽  
Tsuyoshi Miyazaki ◽  
Takayuki Hirai ◽  
...  

Object The surgical approach and treatment of thoracolumbar osteoporotic vertebral collapse with neurological deficit have not been documented in detail. Anterior surgery provides good decompression and solid fusion, but the surgery-related risk is relatively higher than that associated with the posterior approach. In posterior surgery, the major problem after posterior correction and instrumentation is failure to support the anterior spinal column, leading to loss of correction of kyphosis. The aim of this study was to evaluate the efficacy of reinforcing short-segment posterior fixation with vertebroplasty and to compare the outcome with those of posterior surgery without vertebroplasty and anterior surgery, retrospectively. Methods The authors studied 83 patients who underwent surgical treatment for a single thoracolumbar osteoporotic vertebral collapse with neurological deficit. Twenty-eight patients treated by posterior surgery combined with vertebroplasty (Group A), 25 patients treated by posterior surgery without vertebroplasty (Group B), and 30 patients treated by anterior surgery (Group C) were followed up for a mean postoperative period of 4.4 years. Neurological outcome, visual analog scale pain score, and radiographic results were compared in the 3 groups. Results Postoperative (4–6 weeks) and follow-up neurological outcome and visual analog scale scores were not significantly different among the 3 groups. Postoperative kyphotic angle was significantly reduced in Group B compared with Group C (p = 0.007), whereas the kyphotic angle was not significantly different among the 3 groups at follow-up. The mean ± SD loss of correction at follow-up was 4.6° ± 4.5°, 8.6° ± 6.2°, and 4.5° ± 5.9° in Groups A, B, and C, respectively. The correction loss at follow-up in Group B was significantly higher compared with Groups A and C (p = 0.0171 and p = 0.0180, respectively). Conclusions The results suggest that additional reinforcement with vertebroplasty reduces the kyphotic loss and instrumentation failure, compared with patients without the reinforcement of vertebroplasty. Vertebroplasty-augmented short-segment fixation seems to offer immediate spinal stability in patients with thoracolumbar osteoporotic vertebral collapse; the effect seems equivalent to that of anterior reconstruction.


2008 ◽  
Vol 98 (5) ◽  
pp. 408-413 ◽  
Author(s):  
Levent Karapinar ◽  
Ahmet Kaya ◽  
Taskin Altay ◽  
Hasan Ozturk ◽  
Fatih Surenkok

A 16-month-old male with previously untreated bilateral clubfeet was admitted to S.B. Izmir Tepecik Education and Research Hospital, Izmir, Turkey. Both feet underwent surgical treatment. During surgery, an accessory soleus muscle was detected on the right side. The accessory soleus muscle had a distinct distal insertion at the superior anteromedial border of the calcaneus and also anterior and medial to the Achilles tendon. He was treated by bilateral complete subtalar release with Cincinnati incision, and the accessory soleus was also cut and the distal part resected. At the final follow-up visit, when the patient was 6 years and 9 months old, both feet had a normal appearance and appeared normal on radiograph and magnetic resonance imaging, with no presence of the accessory soleus muscle or its remnant. In our opinion, awareness of the association between an accessory soleus muscle and clubfoot, and sectioning of this muscle during surgery may improve surgical results. (J Am Podiatr Med Assoc 98(5): 408–413, 2008)


2019 ◽  
Vol 1 (4) ◽  
Author(s):  
Yustinus Robby Budiman Gondowardojo ◽  
Tjokorda Gde Bagus Mahadewa

The lumbar vertebrae are the most common site for fracture incident because of its high mobility. The spinal cord injury usually happened as a result of a direct traumatic blow to the spine causing fractured and compressed spinal cord. A 38-year-old man presented with lumbar spine’s compression fracture at L2 level. In this patient, decompression laminectomy, stabilization, and fusion were done by posterior approach. The operation was successful, according to the X-Ray and patient’s early mobilization. Pneumothorax of the right lung and pleural effusion of the left lung occurred in this patient, so consultation was made to a cardiothoracic surgeon. Chest tube and WSD insertion were performed to treat the comorbidities. Although the patient had multiple trauma that threat a patient’s life, the management was done quickly, so the problems could be solved thus saving the patient’s life. After two months follow up, the patient could already walk and do daily activities independently.


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