Spinal Synovial Cysts Research Articles

Synovial cysts at the cervicothoracic junction: Illustrative series of three cases.

Spinal synovial cysts are an uncommon pathology, estimated to affect 0.65-2.6% of the population. Cervical spinal synovial cysts are even rarer, accounting for only 2.6% of spinal synovial cysts. They are more commonly found in the lumbar spine. When they occur, they can compress the spinal cord or surrounding nerve roots resulting in neurological symptoms, particularly when they increase in size. Decompression and cyst resection are the most common treatment and typically result in resolution of symptoms. The authors present three cases of spinal synovial cysts occurring at the C7-T1 junction. They occurred in patients aged 47, 56, and 74, respectively, and presented with symptoms of pain and radiculopathy. Diagnosis was made with computed tomography (CT) scan and magnetic resonance imaging (MRI). The cysts were managed with laminectomy, resection, and fusion. All patients reported full resolution of symptoms. There were no intra or postoperative complications. Cervical spinal synovial cysts are an uncommon cause of radiculopathy and pain in the upper extremities. They can be diagnosed through CT scans and MRI, and treatment with laminectomy, resection, and fusion results in excellent outcomes.

ID: 217220 Treatment of Lumbar Facet Cyst Causing Radiculopathy With an Intra-Articular Facet Injection - Case Report

Lumbar facet cysts are an atypical cause of low back pain and radiculopathy [1,2]. Spinal synovial cysts are benign protrusions of facet joint capsules caused by degenerative spondylosis, most frequently involving the L4-5 level, that can cause mechanical impingement on the traversing nerve root [3,4]. While the typical recommended treatment involves surgical cyst resection, a less invasive, fluoroscopic-guided percutaneous approach may be an effective treatment to consider prior to surgery [1]. In this report, we present a case report of a patient with radicular back pain from a lumbar L4-5 facet cyst who was successfully treated with a percutaneous fluoroscopic-guided lumbar facet cyst rupture.

Evaluation of the systemic inflammatory response in patients with a spinal synovial cyst or lumbar disc herniation

Aims: This study aimed to determine whether a systemic inflammatory response occurs in patients with spinal synovial cysts (SSC) and patients with lumbar disc herniation. Methods: Patients who underwent surgery for SSC or lumbar disc herniation between 2016-2022 were included in the study. To compare the results of these patients, patients who applied to the outpatient clinic due to headaches but did not find any abnormal findings in the radiological examinations were also included. Age, gender, duration of stay in the hospital, comorbidity, and histopathological evaluation results were recorded for all patients. The lumbar T2 weighted MR sagittal and axial images obtained on admission to the hospital were examined. The venous blood samples taken from the patients on first admission to the hospital were analyzed biochemically. Results: There was no statistical difference between the three groups regarding age, gender, and blood biochemistry parameters. Furthermore, no statistical difference was found between SSC patients and patients with lumbar disc herniation in age, gender, cyst or herniated disc localization levels, comorbidity, and blood biochemistry analysis results. Correlation analysis for the findings of all patients revealed that no parameters were correlated with the study groups. ROC-Curve test and Logistic Regression tests showed that no parameter could be a predictive marker in differentiating SSC from disc herniation. Conclusion: Study results demonstrated that neither SSC nor disc herniation caused a systemic inflammatory or allergic reaction in the patients. In addition, it was determined that no biochemical parameter could distinguish disc herniation from SSC.

Lumbar Synovial Cysts-Should You Fuse or Not?

Spinal synovial cysts are lesions that most commonly occur in the lumbar region. The need for an instrumented spinal fusion in addition to lumbar decompression with removal of the synovial cyst is unknown. To test the hypothesis that select patients who underwent decompression with instrumented fusion for lumbar synovial cysts would be less likely to have subsequent surgery (SS) in a 2-year period than patients treated with laminectomy alone. This retrospective cohort study was performed using IBM MarketScan Commercial Claims and Encounters Database. Patients who had a lumbar synovial cyst diagnosis and laminectomy surgery with or without fusion surgery were included in this study. Patients were tracked for SS 2 years after surgery. Laminectomy patients were propensity score-matched to laminectomy with fusion (LF) patients using a 2:1 ratio. The log-rank test and Cox regression were used to compare the cumulative incidence of SS between groups. There were 7664 and 1631 patients treated with laminectomy and LF before matching. After matching, there were 2212 laminectomy and 1631 LF patients and patient characteristics were balanced. The 2-year incidence of recurrent SS was 3.1% ([CI]: 2.2%, 4.0%) and 1.7% (95% CI: 0.9%, 2.5%) laminectomy and LF, respectively. Compared with laminectomy, LF had a statistically significant lower risk of recurrent SS (hazard ratio: 0.56 [95% CI: 0.32-0.97]; P -value: .04). All patients who had concomitant lumbar fusion showed decreased chance of having a cyst- or noncyst-related recurrence SS when compared with all patients undergoing laminectomy alone, regardless of diagnosis at the time of SS.

Five-Year Outcomes After Decompression and Fusion Versus Decompression Alone in the Treatment of Lumbar Synovial Cysts

Spinal synovial cysts are acquired, fluid-filled lesions of the facet joint that most commonly occur in the lumbar spine. They are thought to arise from degenerative changes and to result from segmental instability. Although the treatment of these lesions has been studied, the long-term implications and effects of the different strategies for surgical intervention (i.e., decompression and fusion vs. decompression alone) have not yet been elucidated or established. Using an all-payer database with 53 million patient records (MARINER-53), patients with a diagnosis of lumbar synovial cysts were identified. Patients who had undergone lumbar fusion versus laminectomy were matched 1:1 using binomial and gaussian logistic regression models to evaluate the need for future lumbar surgery within 5 years after their index procedure. No statistically significant differences were noted between the 5-year rates of subsequent intervention, additional laminectomy, or fusion among patients who had undergone index decompression and fusion (n= 51; 10.5%) versus decompression alone (n= 43; 8.8%; P= 0.39). Furthermore, no significant differences were found in the odds of intervention type after index decompression and fusion versus decompression alone (subsequent laminectomy: odds ratio, 0.59; 95% confidence interval, 0.32-1.09; subsequent fusion: odds ratio, 1.14; 95% confidence interval, 0.64-2.02). Patient-specific factors and surgeon-patient-shared decision-making should be used when planning interventions for these lesions. However, synovial cysts might not require a fusion procedure for presumed instability. Further investigation is required, using randomized and prospective studies, to further evaluate the effective treatment of this entity.

Acute development of spinal lumbar synovial facet cyst within 1 week after lumbar decompression: illustrative case

BACKGROUNDSynovial facet cysts can sometimes develop in patients with lumbar spinal stenosis after decompressive laminectomy. The etiology of spinal lumbar synovial cysts is still unclear, but their formation is associated with underlying spinal instability, facet joint arthropathy, and degenerative spondylolisthesis.OBSERVATIONSA 61-year-old-male patient presented with neurogenic claudication due to lumbar spinal stenosis. Radiographic studies showed grade I spondylolisthesis and radiological predictors of delayed spinal instability. He underwent lumbar decompression and shortly thereafter developed spinal instability and recurrent symptoms, with formation of a new spinal lumbar synovial facet cyst. He required revisional decompression, cyst excision, and posterolateral spinal fusion for definitive treatment.LESSONSThe literature reports postoperative spinal instability in up to one-third of patients with lumbar spinal stenosis and stable degenerative spondylolisthesis who undergo decompressive laminectomy. Close radiographic monitoring and early advanced imaging may be prudent in this patient population if they develop new postoperative neurological symptoms and show radiographic predictors of instability on preoperative imaging. Posterolateral spinal fusion with instrumentation should be considered in addition to lumbar decompression in this select group of patients who demonstrate radiographic predictors of delayed spinal instability if they are medically capable of tolerating a spinal fusion procedure.

Cervical myelopathy caused by ventrally located atlanto-axial synovial cysts: An open quest for the safest and most effective surgical management. Case series and systematic review of the literature

Summary of background dataDespite a good understanding of the natural history of spinal synovial cysts (SCs), a widespread agreement regarding their optimal management is still lacking. This is particularly true for SCs occurring at the C1-C2 level, which are rare, but oftentimes lead to a rapidly evolving cervical myelopathy. MethodsWe report a series of 4 patients (M:F ratio=1:1; mean age 63.5 years) presenting with progressive cervical myelopathy secondary to ventrally located C1-C2 SCs. All patients underwent a postero-lateral facet-sparing intradural approach with total excision of the SCs. Functional status was assessed pre- and postoperatively with Nurick scale and the modified Japanese Orthopaedic association grading. Furthermore we conducted a systematic review, following PRISMA guidelines of pertinent literature to contextualize the options for surgical management of such lesions. ResultsComplete excision of the SCs was confirmed radiologically and on histological analysis. All measures of functional status improved post-operatively, and no cyst recurrence or need for instrumented fusion were noted during follow up (range from 22 to 88 months). ConclusionOur experience suggests that the facet-sparing intradural approach provides excellent clinical outcomes without causing any C1–C2 instability. This is in keeping with the take home message emerging from our literature review, which confirms that treatment should aim at radical resection of SCs while minimizing the risk of postoperative instability.

253. Long term outcome following percutaneous image-guided treatment of spinal synovial cysts: a population-based cohort study

BACKGROUND CONTEXT Spinal synovial cysts, also known as lumbar facet joint cysts, are fluid-filled sacs that develop at the facet joints along the spine, most commonly as a result of degeneration and destabilization. Their estimated prevalence is 1%, and they are most often found at the L4-L5 level. For symptomatic patients, there is little evidence on which treatment is most effective. Percutaneous options would be preferable to avoid destabilization of the spine. However, some claim that percutaneous treatment does not provide sustainable long-term effects and recommend immediate surgery instead. This debate is heavily limited by the fact there are no long-term studies for percutaneous treatment options. PURPOSE The aim of this study was to assess long-term outcome in patients with spinal synovial cysts who were treated with minimally invasive percutaneous intra-articular steroid treatment. STUDY DESIGN/SETTING Population-based retrospective cohort study PATIENT SAMPLE Thirty-nine patients treated with minimally invasive percutaneous intra-articular steroid treatment and followed for a median of 11 years (range 3 – 21). OUTCOME MEASURES Self-assessed long-term pain relief without the need for invasive surgery. METHODS A population-based cohort-study was conducted of all adult (≥15 years) patients with symptomatic lumbar synovial cysts who were treated with percutaneous intra-articular steroid treatment between 1995 and 2014. Medical records and imaging data from digital hospital charts were retrospectively reviewed and standardized telephone interviews were performed to assess long-term results. Paired testing was applied. RESULTS Thirty-nine patients were included. All patients suffered from variations of lower back and leg pain, with two patients reporting unilateral leg weakness as well. Twenty-seven (67%) patients were female, and the median age was 61 years. The majority of the cysts were located at the L4-L5 level (56%). Successful intra-articular steroid treatment was achieved in 87% of cases. Thirty patients (77%) showed initial pain relief at the follow-up evaluation with their referring physician. During a median long-term follow-up of 11 years, 31% of the original cohort had sustained long-term pain relief without the need for invasive surgery. CONCLUSIONS Percutaneous treatment of spinal synovial cysts has excellent short-term outcome but results appear to diminish over time. While surgical methods have higher rates of treatment success, they risk the need for delayed stabilization surgery. Percutaneous treatment obviates the need for surgery in a substantial number of patients and can be suggested as a first line treatment. FDA DEVICE/DRUG STATUS DepoMedrol with lidocaine; Pfizer, (Approved for this indication)

Long-term pain relief following percutaneous steroid treatment of spinal synovial cysts: a population-based cohort study

BackgroundSpinal synovial cysts are fluid-filled sacs that develop after facet joint degeneration and can give rise to radicular pain. If resistant to conservative management, surgical decompression or percutaneous steroid treatment...

The Results of Microsurgery without Fusion for Lumbar Synovial Cysts: A Case Series of 50 Patients

The treatments described for spinal synovial cysts range from percutaneous puncture to arthrodesis. There is a fear of postoperative instability after surgical resection of cysts, mainly when they are associated with degenerative spondylolisthesis. The objective of the article is to address the postoperative instability and recurrence rate of the symptoms after microsurgery without fusion. We report a consecutive series of 50 patients with lumbar synovial cysts operated on with microsurgery without arthrodesis. Functional status was assessed postoperatively by the MacNab success scale and by self-assessment using the Weiner scale, the 36-item short-form health survey (SF-36), and the Oswestry scale. The presence of preoperative and postoperative instability was determined with static and dynamic lumbar spine X-rays before surgery and in the last follow-up at 2 years to evaluate the presence of spondylolisthesis before and after surgery. Facet inclination angle and stage of disc degeneration at the level of the cysts were evaluated. Disc degeneration was defined by the modified Pfirrmann grading system. The mean Oswestry index was 12 ± 12.6% (median 8, 0-53). Based on the MacNab scale, 98% were considered excellent and good. The Weiner scale showed that low back pain was present in 16% of patients postoperatively. There was significant improvement of leg strength and pain in 96% and 94%, respectively. Only 3 patients were reoperated on with late fusion. Total surgical resection was obtained in all cases, with a late fusion rate of only 6% and no recurrence at the operated site. The microsurgical treatment for synovial cysts without arthrodesis presented excellent and good results in the majority of cases. It is necessary to carry out prospective randomized studies to clarify the best therapeutic options.

The Variability of Lumbar Facet Joint Synovial Cyst Recurrence Requiring Revision Surgery After Decompression-only and Decompression/Fusion.

This is a retrospective study. The objective of this study was to evaluate lumbar spine synovial cyst recurrence rates of decompression-alone versus decompression/fusion procedures. Improvements in imaging modalities allow for increased diagnosis and surgical treatment of symptomatic spinal juxtafacet synovial cysts. Conservative management may be used as a first-line management strategy, however rarely provides durable, effective relief of symptoms. Surgical treatment of spinal synovial cysts ranges from decompression and cyst excision to decompression with fusion procedures. Decompression procedures alone have a higher risk of recurrence of spinal synovial cysts. We retrospectively reviewed 87 patients undergoing surgical treatment of lumbar spinal juxtafacet synovial cysts as a single institution over 20 years. Surgical treatment consisted of either decompression versus decompression/fusion procedures. Preoperative symptoms included back pain, radiculopathy, motor deficits, or sensory deficits. The incidence of recurrence of spinal synovial cysts at the same-site or differing sites was compared between 2 categories of surgical treatment. Revision surgical procedure rates were also evaluated. A total of 55 (63%) patients were treated with an index decompression-only procedure for the lumbar spinal synovial cyst compared with 32 (37%) patients treated with an index decompression and fusion procedure. Fifty-eight (68%) of the lumbar spinal cysts occurred at the L4-L5 level. There were 10 (11.5%) spinal synovial cyst recurrences in the decompression-only group, and 0 recurrences in the decompression/fusion group. Revision decompression procedures were performed in 4 of the 10 (4.6%) recurrences, and 6 of 10 (6.9%) recurrences had subsequent decompression and fusion surgery. The mean time to recurrence was 23.9±17.3 months. The mean length of follow-up was 65.1±48.6 months. Both recurrence and nonrecurrence cohorts had significant symptomatic improvement using Odom criteria. Decompression and cyst excision was the more common surgical treatment of lumbar spinal synovial cysts compared with decompression/fusion procedure in our study. The rate of synovial cyst recurrence and revision surgery in patients undergoing index decompression was relatively low and comparable to current literature. Symptomatic improvement of patients undergoing decompression versus decompression/fusion was similar in our study. Although the fusion may be required for the extent of pathology or coexisting instability, decompression and excision of spinal synovial cysts provide durable, effective treatment with a known, appropriate risk of recurrence and subsequent revision surgery.

Bilateral synovial cyst of the thoracic spine causing paraparesis

Spinal synovial cysts are degenerative extradural lesions mostly found in the lumbar region, and more rarely at cervical or thoracic levels and in a bilateral presentation. We report a patient with a history of progressive paraparesis associated with bilateral cervicothoracic synovial cysts, causing spinal canal narrowing and cord compression, ultimately resulting in myelopathy. A review of the literature summarizes previous reports on this topic. Surgical excision of the extradural mass, decompression of the spinal canal and instrumented fusion were performed, improving lower limb deficit and gait. Post-surgical MRI showed evidence of complete cyst resection, and good arthrodesis consolidation with adequate sagittal balance. Surgical excision is indicated in case of medical treatment failure or increasing symptom severity. Given the strong pathophysiological link between synovial cysts and spinal instability, concomitant instrumented fusion may help improve outcome.

Minimally invasive resection of spinal synovial cysts: Technical note

ResumenObjetivo:Presentar el algoritmo de tratamiento, técnica quirúrgica y resultados de una serie de pacientes con quistes sinoviales espinales resecados con técnica mínimamente invasiva (MIS).Introducción:Los quistes sinoviales espinales se originan a partir de la dilatación y potencial ruptura de la vaina sinovial de una articulación facetaria, la resección quirúrgica es considerada el tratamiento de elección en pacientes sintomáticos. La utilización de técnicas MIS podrían disminuir la disrupción de la faceta articular comprometida reduciendo el riesgo de inestabilidad postoperatoria.Material y métodos:Se evaluaron retrospectivamente 21 pacientes con quistes sinoviales espinales operados mediante abordaje y descompresión MIS, se analizaron los signos, síntomas, tiempo quirúrgico, estadía hospitalaria, evolución y complicaciones. Se utilizó la escala visual analógica (EVA), para evaluar el dolor y la escala de Weiner y los criterios de Macnab modificados para medir la satisfacción posoperatoria del paciente.Resultados:Se trataron quirúrgicamente 21 pacientes (13 mujeres, 8 hombres), el 76,2% (n = 16) de los pacientes de la serie no requirió artrodesis, el 23,8% (n = 5) restante fue fusionado. Realizamos 13 (61,9%) hemilaminectomías contralaterales, 7 hemilaminectomías ipsilaterales (33,3%) y una laminectomía en el QS S1-S2 con técnica MIS. El seguimiento promedio fue de 26 meses, el tiempo de cirugía fue de 150,33 ± 63,31 min., con una estadía hospitalaria de 2,5 ± 1,78 días. La EVA disminuyó de 8,3 preoperatoria a 2,3 postoperatoria. Siguiendo la escala de Macnab; 16 pacientes refirieron resultados excelentes, 4 buenos y 1 regular, el 95,2% de los pacientes percibió que el procedimiento tuvo mucho/bastante éxito según la escala de Weiner.Conclusión:El abordaje mínimamente invasivo es un procedimiento seguro y eficaz para la resección completa de quistes sinoviales espinales. Proporciona resultados clínico-funcionales excelentes preservando músculos, ligamentos y facetas articulares.

Degenerative symptomatic spinal synovial cysts: Clinical presentation and functional outcome

Spinal synovial cysts (SSC) are a rare but important differential diagnosis for degenerative or space-occupying spinal lesions. There is controversy about the most beneficial treatment, which can be conservative or surgical. We provide a review of our surgical data for purposes of quality assessment and improvement.5313 patients with surgically treated degenerative spinal diseases were analyzed retrospectively. The incidence of SSC was 1.14%. 61 patients (31 women, 30 men; mean age 65.3 years) with SSC were included in this study. The charts, surgical reports, and radiographic data were reviewed for demographics, duration of symptoms, size of SSC, anatomical site, surgical approach, Visual Analog Scale (VAS), and neurological performance including the Japanese Orthopedic Association Score (JOA score) and the Frankel score.Laminotomy was the most common surgical approach in 93.4% of the patients followed by hemilaminectomy in 6.6%. The predominant site of SSC was the lumbar spine in 86.9%. 95.1% had experienced local and radicular pain as the predominant symptom and 47.5% preoperative sensory and motor deficits. At discharge, the JOA score was significantly increased compared to admission (median value of 17). At follow-up, 94.4% had normal neurological function and 5.6% showed grade 1 neurological deficits. Leg pain had decreased in 94.4% and back pain in 70.6%. At long-term follow-up, all patients presented neurologically stable. The median value for pain classified with the VAS had decreased from 6 at admission to 1 at long-term follow-up. During long-term follow-up, 6 patients (9.8%) had developed spinal instability requiring stabilization, 5 patients had received facet joint infiltration due to symptomatic facet joint syndrome.The epidemiological and clinical patterns of symptomatic SSC are similar to those of other degenerative spinal diseases. Thus, SSC should always be considered as a rare but important differential diagnosis. Surgical outcome was excellent with immediate symptom relief and recovery, which further improved over time. Our data support the benefit of surgical treatment and may be useful in recommending neurosurgical therapy to patients with SSC.

Spinal synovial cysts causing neurological deficit

Synovial cysts of the spine are usually asymptomatic, rarely causing nerve root or spinal cord compression. The authors report on two cases of spinal synovial cysts. One patient harbored a cervical cyst causing myelophaty, and a secondpatient had a lumbar cyst with gradual development of radiculopathy. In both cases the patients had improvement of the symptoms and good outcome after surgical removal of the cysts. Synovial cysts should be considered in the differential diagnosis of any spinal extradural masses. The literature is reviewed and the etiological, clinical presentation, diagnosis and treatment are discussed.

Surgical Treatment of Spinal Synovial Cysts in Elderly Patients: Symptoms, Treatment Course, and Outcome in Patients >75 Years of Age.

With the aging of our society comes a rising number of elderly patients with progressive degeneration of the spine associated with synovial cysts. Surgical treatment may be particularly challenging in elderly patients because of comorbidities. Patients treated in our department between 1999 and 2014 for spinal synovial cysts were screened. The 28 patients ≥75 years old were classified as elderly and were compared with 96 patients 50-74 years old. No patient underwent fusion as part of cyst resection. Despite a significantly higher frequency of muscle reflex changes in elderly patients at presentation, symptoms, cyst levels, rate of complications, and surgical method were not different between groups. Cyst adherence to the dura and subtotal resection were observed significantly more often in the elderly group (18% vs. 3%; P < 0.05). Outcome according to the Oswestry Disability Index was classified as no disability or minimal disability in 85% of the elderly group and in 82% of the control group. Recurrent cyst and delayed fusion rates were lower in the elderly group (4% and 4%) compared with the control group (7% and 8%). The clinical course of elderly patients with surgical treatment of spinal synovial cysts did not differ compared with younger patients. Good or excellent results could be achieved and persisted for a long time in most cases. Fusion should be performed only in cases of severe instability. Nonaggressive cyst removal in cases of dural attachment enables low cerebrospinal fluid fistula rates without increasing cyst recurrence rates.

Synovial cysts of the spine: long-term follow-up after surgical treatment of 141 cases in a single-center series and comprehensive literature review of 2900 degenerative spinal cysts.

OBJECTIVE Synovial cysts of the spine are rare lesions, predominantly arising in the lumbar region. Despite their generally benign behavior, they can cause severe symptoms due to compression of neural structures in the spinal canal. Treatment strategies are still a matter of discussion. The authors performed a single-center survey and literature search focusing on long-term results after minimally invasive surgery. METHODS A total of 141 consecutive patients treated for synovial cysts of the lumbar spine between 1997 and 2014 in the authors' department were analyzed. Medical reports with regard to signs and symptoms, operative findings, complications, and short-term outcome were reviewed. Assessment of long-term outcome was performed with a standardized telephone questionnaire based on the Oswestry Disability Index (ODI). Furthermore, patients were questioned about persisting pain, symptoms, and further operative procedures, if any. Subjective satisfaction was classified as excellent, good, fair, or poor based on the Macnab classification. RESULTS The approach most often used for synovial cyst treatment was partial hemilaminectomy in 70%; hemilaminectomy was necessary in 27%. At short-term follow-up, the presence of severe and moderate leg pain had decreased from 93% to 5%. The presence of low-back pain decreased from 90% to 5%. Rates of motor and sensory deficits were reduced from 40% to 14% and from 45% to 6%, respectively. The follow-up rate was 58%, and the mean follow-up period was 9.3 years. Both leg pain and low-back pain were still absent in 78%. Outcome based on the Macnab classification was excellent in 80%, good in 14%, fair in 1%, and poor in 5%. According to the ODI, 78% of patients had no or only minimal disability, 16% had moderate disability, and 6% had severe disability at the time of follow-up. In this cohort, 7% needed surgery due to cyst recurrence, and 9% required a delayed stabilization procedure after the initial operation. CONCLUSIONS Surgical treatment with resection of the cyst provides favorable results in outcome. Excellent or good outcome persisting for a long-term follow-up period can be achieved in the vast majority of cases. Complication rates are low despite an increased risk of dural injury. With facet-sparing techniques, the stability of the segment can be preserved, and resection of spinal synovial cysts does not necessarily require segmental fusion.

Ten-Step Minimally Invasive Spine Lumbar Decompression and Dural Repair Through Tubular Retractors.

Minimally invasive spine (MIS) surgery utilizing tubular retractors has become an increasingly popular approach for decompression in the lumbar spine. However, a better understanding of appropriate indications, efficacious surgical techniques, limitations, and complication management is required to effectively teach the procedure and to facilitate the learning curve. To describe our experience and recommendations regarding tubular surgery for lumbar disc herniations, foraminal compression with unilateral radiculopathy, lumbar spinal stenosis, synovial cysts, and dural repair. We reviewed our experience between 2008 and 2014 to develop a step-by-step description of the surgical techniques and complication management, including dural repair through tubes, for the 4 lumbar pathologies of highest frequency. We provide additional supplementary videos for dural tear repair, laminotomy for bilateral decompression, and synovial cyst resection. Our overview and complementary materials document the key technical details to maximize the success of the 4 MIS surgical techniques. The review of our experience in 331 patients reveals technical feasibility as well as satisfying clinical results, with no postoperative complications associated with cerebrospinal fluid leaks, 1 infection, and 17 instances (5.1%) of delayed fusion. MIS surgery through tubular retractors is a safe and effective alternative to traditional open or microsurgical techniques for the treatment of lumbar degenerative disease. Adherence to strict microsurgical techniques will allow the surgeon to effectively address bilateral pathology while preserving stability and minimizing complications.

Low reoperation rate following 336 multilevel lumbar laminectomies with noninstrumented fusions.

Background:Few reoperations are required in older patients undergoing multilevel lumbar laminectomy with noninstrumented fusions for spinal stenosis with/without spondylolisthesis/instability, and they rarely require instrumentation.Methods:We reviewed 336 patients averaging 66.5 years of age undergoing initial average 4.7 level lumbar laminectomies with average 1.4 level noninstrumented fusions over an average 7.1-year period (range 2.0–16.5 years). Patients uniformly exhibited spinal stenosis, instability (Grade I [195 patients] or Grade II spondylolisthesis [67 patients]), disc herniations (154 patients), and/or synovial cysts (66 patients). Reoperations, including for adjacent segment disease (ASD), addressed new/recurrent pathology.Results:Nine (2.7%) of 336 patients required reoperations, including for ASD, an average of 6.3 years (range 2–15 years) following initial 4.7 level laminectomies with 1.4 level noninstrumented fusions. Second operations warranted average 4.8 level (range 3–6) laminectomies and average 1.1 level non instrumented fusions addressing stenosis with instability (Grade I [7 patients] or Grade II [1 patient] spondylolisthesis), new disc herniations (2 patients), and/or a synovial cyst (1 patient).Conclusions:Only 9 (2.7%) of 336 patients required reoperations (including for ASD) consisting of multilevel laminectomies with noninstrumented fusions for recurrent/new stenosis even with instability; these older patients were not typically unstable, or were likely already fused, and did not require instrumentation. Alternatively, reoperation rates following instrumented fusions in other series approached 80% at 5 postoperative years. Therefore, we as spinal surgeons should realize that older patients even with instability rarely require instrumentation and that the practice of performing instrumented fusions in everyone, irrespective of age, needs to stop.

Juxtafacet Spinal Synovial Cysts.

Study DesignThis was a retrospective study.PurposeTo study the surgical outcome of synovial cysts of the lumbar spine through posterior laminectomy in combination with transpedicular screw fixation.Overview of LiteratureSynovial cysts of the lumbar spine contribute significantly to narrowing of the spinal canal and lateral thecal sac and nerve root compression. Cysts form as a result of arthrotic disruption of the facet joint, leading to degenerative spondylolisthesis in up to 40% of patients.MethodsRetrospective data from 6 patients, treated during the period of March 2007 to February 2011, were analyzed. All preoperative and postoperative manifestations, extension/flexion radiographs, magnetic resonance imaging, and computed tomography records were reviewed. All underwent surgery for synovial cysts with excision and decompression combined with posterior fixation. The result of surgery was evaluated with Macnab's classification. An excellent or good outcome was considered as satisfactory. Japanese Orthopedic Association Scale was used for evaluation of back pain.ResultsAll patients included in this study had excellent outcomes as regarding to improvement of all preoperative manifestations and returning to normal daily activities. Only 2 cases developed postoperative transient cerebro-spinal fluid leak and were treated conservatively and improved during the follow up period.ConclusionsAlthough this study included a small number of cases and we could not have statistically significant results, the good outcome of decompression of synovial cysts combined with posterior fixation and fusion encouraged us to recommend this approach for patients with juxtafacet synovial cysts.