Stereotactic radiosurgery with Cyberknife®: first case in the United Arab Emirates (a case report).

A 64-year-old gentleman was referred to the department of oncology with severe pain in the right ear radiating to the right side of the face. Imaging revealed a large extra-axial expansile lesion, surrounding and encasing the right cavernous sinus extending to the right middle cranial fossa. The patient consulted several neurosurgeons and was recommended stereotactic radiosurgery with Cyberknife® as the best non-invasive modality. The proximity to the critical structures, such as the brainstem, made it challenging for any surgical approach. The patient completed stereotactic radiosurgery with Cyberknife® and is doing well one month after treatment.

Cerebral small vessel disease due to a unique heterozygous HTRA1 mutation in an African man.

OBJECTIVE: To describe the case of an African patient who was diagnosed with cerebral autosomal recessive arteriopathy with subcortical infarcts and leukoencephalopathy (CARASIL). METHODS: Case report and literature review. RESULTS: We present a 39-year-old Gabonese man who developed progressive gait difficulty at the age of 32, followed by insidious tetraparesis, urinary sphincter disturbance, spastic dysarthria, cognitive dysfunction, and seizures. Brain imaging was performed many years after disease onset and revealed diffuse confluent white matter lesions and lacunar infarcts. He tested negative for acquired white matter disease, but genetic screening detected a genetic variant of HTRA1 gene (G283R), which has not been previously reported. CONCLUSIONS: CARASIL is a disease that usually affects Asian patients. This case report describes a unique case of an African patient diagnosed with CARASIL and a novel genetic mutation in HTRA1 that has not been previously described in the literature.

Quality of Spine Surgery Research from the Arab Countries: A Systematic Review and Bibliometric Analysis.

Purpose. The purpose of our study is to evaluate the level of evidence (LOE) of spine surgery publications in the Arab countries and compare it with standard international literature in spine surgery and to determine the stand of the Arab nations academic production with that of the global one. Methods. An online search using "PubMed" and "Google Scholar" was carried out, using search terms related to spine surgery such as "Spine surgery," "Scoliosis," "Herniated disc." Each article was reviewed and graded by two reviewers using Oxford Centre for Evidence-Based Medicine (OCEBM) Levels of Evidence scale. Results. We have identified 434 articles that met the inclusion criteria; 56% were level IV studies. The most common study design was case reports (42%). The number of Arab countries with publications in spine surgery was 18 countries. The country with the highest rate of publications was Egypt (26%). The quantity of the published studies increased from 151 in (2000-2008) to 283 in (2009-2015). There is statistical significance between high and low LOE articles (p = 0.0007). Conclusion. We have observed that LOE has not changed significantly over the period of 15 years and that much of the publications are of a low LOE (levels III and IV). We, herein, emphasize the need for spine surgeons in the Arab countries to conduct studies of higher LOE.

Combining pedicle screw stimulation with spinal navigation, a protocol to maximize the safety of neural elements and minimize radiation exposure in thoracolumbar spine instrumentation.

PURPOSE: The O-arm-based navigation increases the accuracy of pedicle screw positioning and offers the possibility of performing a 3D scan before wound closure. However, repeating the 3D scan exposes the patient to additional radiation. We combined O-arm navigation with pedicle screw (PS) stimulation followed by a 3D scan to evaluate their accuracy and aimed for the creation of a protocol that maximizes the safety and minimizes radiation. METHODS: Patients had pedicle screws insertion using O-arm spinal navigation, then had PS triggered electromyography (EMG), and finally a 3D scan to evaluate the accuracy of screw position. RESULTS: 447 screws were inserted in 71 patients. In 10 patients, 11 screws needed repositioning. Comparing results of PS triggered EMG responses to the 3D scan, we found: (a) negative stimulation response with negative 3D scan findings, corresponding to 432 acceptable screw position (96.6 %) in 58 patients (81.7 %). In these cases, the redo 3D scan could be avoided. (b) Positive stimulation response with positive 3D scan findings, corresponding to 7 unacceptable screw position (1.5 %) in 6 patients (8.4 %). In these cases, PS stimulation detected malpositioned screws that would be missed without a redo 3D scan. CONCLUSION: We propose a protocol of routinely performing PS stimulation after screw insertion using spinal navigation. In case of positive stimulation, a 3D scan must be performed to rule out a probable screw mal position (6 patients 8.4 %). However, in case of negative stimulation, redo 3D scan can be avoided in 81.7 % of patients.