Mexican Multicenter Experience of Metastatic Spinal Disease.

Background Spinal metastatic disease is a silent progressive cancer complication with an increasing prevalence worldwide. The spine is the third most common site where solid tumors metastasize. Complications involved in spinal metastasis include root or spinal cord compression, progressing to a declining quality of life as patient autonomy reduces and pain increases.

Single Dose of Tranexamic Acid Effectively Reduces Blood Loss in Patients Undergoing Spine Surgery: A Prospective Randomized Controlled Trial.

Objective: To evaluate the efficacy of oral administration of tranexamic acid (TXA) in spine surgery to achieve blood loss reduction.

Methods: Sixty patients undergoing major surgery of the spine were randomly assigned into 2 groups. Group 1 was assigned as the control group and the other group comprised patients who received oral administration of TXA 2 hours before surgery.

Women in Neurosurgery: First Neurosurgeon in Latin America and Current Mexican Leaders.

Background: History has taught us that Mexican culture has been largely supported by women, despite gender prejudice from the society. Neurosurgery has not been the exception. Therefore, we investigated the challenges and influence of female neurosurgeons in Mexico.

Posterior Grade 4 Osteotomy With Vertebral Shortening Is Effective for the Treatment of Kyphosis Associated With Vertebral Discitis/Osteomyelitis.

Background: In the retrospective study of a prospectively maintained database, we present a case series of patients with kyphotic deformity secondary to spinal infection treated using a posterior-only approach with 3-column shortening and posterior instrumentation.

Methods: This is a case series of patients presenting with postural deformity and sagittal imbalance treated consecutively by 1 surgeon between 2012 and 2014. Clinical assessments and radiographic evaluations were made preoperatively and at 12- and 24-month postoperative follow-ups.

Biomechanical behavior of bone tissue in spine instrumentation.

Background: The mechanical fixation of the spine in patients with osteoporotic vertebral degeneration is a challenge for surgeons, the vertebrae selected to insert the screws may fail, endangering health and even patient's life.

Objective: The objective of the study was to study the effect of the variation of the bone density in the bone-screw interface from a three-dimensional model of the lumbar section.

Materials And Methods: The finite element method was used to model the behavior of the lumbar vertebral section when applying compression loads.

Characteristics of Spinopelvic Sagittal Alignment in Lumbar Degenerative Disease.

Background: Normal sagittal alignment shows a range of variations and normal values. This study compared sagittal vertebral alignment in patients with different degenerative lumbar diseases.

Methods: This cross-sectional study evaluated 300 patients who were enrolled between June 2016 and June 2017.

Tophaceous Gout in the Lumbar Spine Causing Radiculopathy.

Tophaceous deposits in lumbar spine is considered a rare condition. We report the case of a 44-year-old patient with low back pain and radiculopathy. Radiographs revealed lytic spondylolisthesis in L5.

[Results to 4-year follow-up of the treatment of the cervical stenosis by corpectomy, titanium mesh cage and anterior plate fixation].

Background: Cervical spondylotic myelopathy is caused by cervical stenosis. Several techniques have been described for the treatment of multilevel disease, such as the anterior corpectomy with titanium mesh cage and anterior cervical plate placement, which has the advantage of performing a wider decompression and using the same bone as graft. However, it has caused controversy since the collapse of the mesh cage continues being a major limitation of this procedure.

Hybrid Decompression and Fixation Technique for the Treatment of Multisegmental Cervical Spondylotic Myelopathy.

Background: Cervical spondilotic myelopathy (CSM) is defined as the compromise of the spinal cord due to degenerative changes of the cervical spine. It is the most common cause of spinal cord dysfunction in patients over 55 years. An early surgical management it is paramount to achieve better neurological outcome.

[Profile of the patient with failed back surgery syndrome in the National Institute of Rehabilitation. Comparative analysis].

Background: Failed back surgery syndrome is a complication of spine surgery that leads to chronic pain and disability, often with disastrous emotional consequences to the patient.

Aim: To compare the profile of patients whose first surgery was performed in our hospital versus a group that underwent first spine surgery in a different centre.

Methods: Retrospective study with 65 patients; 18 formed group I (first spine surgery performed in our institution), and 47 patients in group II (first surgery performed in another hospital).

3D patient-specific model of the tibia from CT for orthopedic use.

Objectives: 3D patient-specific model of the tibia is used to determine the torque needed to initialize the tibial torsion correction.

Methods: The finite elements method is used in the biomechanical modeling of tibia. The geometric model of the tibia is obtained from CT images.

[Use of the PEEK cage in cervical spondylosis treatment].

Background: Decompression and fusion with autograft is the gold standard technique in the treatment of cervical canal strait. Using PEEK cages or boxes of non-absorbable polymer with elasticity similar to bone, radiolucent, reduces morbidity and same degree of fusion.

Methods: A case series, prospective, longitudinal, deliberate intervention, evaluation panel before and after 2 years follow-up.

Traumatic posterior L4-L5 fracture dislocation of the lumbar spine: a case report.

Study Design Case report. Objective The diagnosis and surgical management of a patient with traumatic bilateral posterior dislocation of L4-L5 is presented with a thorough review of the existing literature. Summary of Background Data Traumatic dislocation of L4-L5 has been reported in the English literature in only five cases; of these, only two were retrolisthesis.

[Transpedicular dynamics stabilization in the treatment of lumbar stenosis. Fourth years follow-up].

Introduction: We need to evaluate the efficacy and safety of the use of dynamic fixation in patients with narrow lumbar through comparing the assessment of two years with 4 years of follow-up.

Methods: Prospective, longitudinal, autocontrol deliberately and sequential intervention, in lumbar stenosis patients who made treatment with dynamic stabilization posterior type Acuflex. An evaluation of four of final follow-up.

Postoperative spinal wound infections treated by external spinal fixator. Review of three cases.

Background: external fixation in the spine has been used with different objectives: to determine the prognosis of spinal fusion, improve stabilization after decompression in cases of trauma and for the progressive correction of scoliosis. Currently, we have not found any reports about its use in the case of postoperative infection with surgical wound dehiscence.

Clinical Cases: this is a retrospective study of three patients with postoperative infection of the spine and wound dehiscence.

Dynamic interspinous stabilization in lumbar discectomy: 4-year follow-up.

Background: Semirigid posterior stabilization is an alternative, avoiding arthrodesis in operated segments. However, this results in the need for dynamic stabilization to allow a stable feature function.

Methods: We conducted a prospective longitudinal self-reported interventional study.

Posterior dynamic stabilization of the lumbar spine with the Accuflex rod system as a stand-alone device: experience in 20 patients with 2-year follow-up.

Decompression surgery for lumbar spinal stenosis is a common procedure. After surgery, segmental instability sometimes occurs, therefore, different methods for restabilization have been developed. Dynamic stabilization systems have been designed to improve segmental stability.

Malignant peripheral nerve sheath tumors associated with neurofibromatosis type 1: report of two clinical cases.

Background: Malignant peripheral nerve sheath tumor (MPNST) is a sarcoma with a high grade of malignancy originating in the nerve sheath components, fibroblasts, perineural cells, and Schwann cells. It is associated with neurofibromatosis type 1 (NF-1) with a risk of 10-13%.

Clinical Cases: We present two cases of NF-1-associated MPNST.

[Vertebral hemangioma of the posterior arch with subsequent extraosseous extension and neurological symptoms. Case report and literature review].

Background: Vertebral hemangioma is the most common benign spinal tumor and is found in 11% of postmortem studies as a slow-growing benign vascular malformation. It usually involves the vertebral body and sometimes the posterior vertebral elements. When the posterior elements are involved, spinal cord compression with neurological symptoms are seen more often.

[Primary intradural extramedullary tumors treated at the National Institute of Rehabilitation (Mexico)].

Background: Spine tumors are uncommon injuries affecting a low percentage of the population; however, these tumors can cause significant morbidity and may be related to mortality. They represent 15% of craniospinal tumors. The objective of this study is to determine the frequency of intradural extramedullary spine tumors treated in our Service and to report the definitive histopathological diagnosis.

[Results of the surgical treatment of atlantoaxial instability].

Background: Instability of the cervical spine is defined as an increase in flexibility farther than the physiological limits of one vertebra over another in some of its axes, conditioning symptoms for the patient. Traumatic, degenerative, metabolic and neoplastic causes have all been identified.

Methods: A retrospective, longitudinal, observational and descriptive study was carried out on patients surgically intervened specifically for atlantoaxial instability from January 1993 to May 2002, with a minimum 5-year follow-up.

[Clinical and radiological follow-up of Nubac disc prosthesis. Preliminary report].

Background: Lumbar arthroplasty is an alternative to fusion for the treatment of degenerative disc disease. Replacement of the nucleus pulposus preserves the biomechanical properties in the annulus and plates, conserving lumbar motion. Our objective was to evaluate the feasibility and clinical and radiological findings at 3 months follow-up with the Nubac device.

[Vertebral destruction syndrome. Diagnostic evaluation systems].

Background: Vertebral Destruction Syndrome (VDS) is a pathology of multiple etiologies causing structural alterations of the spine, producing deformity with neurological and mechanical alterations. In order to study VDS, a diagnostic process is carried out, sometimes with unexpected results. We undertook this study to validate the systematization of a series of studies to arrive at the diagnosis of VDS.

[Percutaneous biopsy evaluation in the diagnosis of thoracic and lumbar vertebral destruction syndrome].

Background: The vertebral destruction syndrome is defined as those pathologies affecting the integrity of the vertebral structure, modifying its normal architecture and resulting in neurological deficit. Correct diagnosis is essential to define appropriate treatment. Biopsy, in addition to histopathological study, is a vital element for definitive diagnosis.

[Surgical treatment of craniocervical instability. Review paper].

The concept of spinal instability is still controversial. Anatomical, biomechanical, clinical and radiographic variants are involved and make the definition complicated. There are solid diagnostic bases in cases of fractures and degenerative disorders; however, pure spinal instability is still under study.