Gamma Knife Radiosurgery for High-Grade Gliomas: Single-Center Experience of Six Years in China
Conclusion: GKRS can be used to effectively treat malignant brain glioma and can therefore be used as an alternative treatment option.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - March 23, 2021 Category: Neurosurgery Source Type: research

Hidden Error in Optical Stereotactic Navigation Systems and Strategy to Maximize Accuracy
Conclusions: Use of optical neuronavigation is expected to increase in frequency and variety of indications. Successful implementation of this technology depends on understanding the tolerances built into the system. In situations that depend on extremely high precision, surgeons should familiarize themselves with potential sources of error so that systems may be optimized beyond the manufacturer ’s built-in tolerances. We recommend that surgeons align the navigation reference plate and any optical instrument’s reference plate spheres in the plane perpendicular to the line of site of the camera to maximize accuracy.Ste...
Source: Stereotactic and Functional Neurosurgery - March 19, 2021 Category: Neurosurgery Source Type: research

Gamma Knife Radiosurgery of Distal Aneurysm: A Case Series
A series of 3 patients (35 –60 years old) with bleeding distal aneurysm not associated with AVM who underwent radiosurgery by gamma knife are reported. One isocentre centralized over the aneurysm was used; peripheral dose 24–28.8 Gy was applied. Control angiography 20–36 months after gamma knife surgery (GKS) demonstrat ed obliteration of both the aneurysm and the feeding artery, without deterioration of the neurological symptoms. Our case series implies that GKS might serve as a safe mini-invasive technique in the treatment of selected distal aneurysms.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - March 17, 2021 Category: Neurosurgery Source Type: research

The Brain Connectome after Gamma Knife Radiosurgery of the Ventro-Intermediate Nucleus for Tremor: Marseille-Lausanne Radiobiology Study Protocol
Essential tremor (ET) is the most common movement disorder. Deep brain stimulation is the current gold standard for drug-resistant tremor, followed by radiofrequency lesioning. Stereotactic radiosurgery by Gamma Knife (GK) is considered as a minimally invasive alternative. The majority of procedures aim at the same target, thalamic ventro-intermediate nucleus (Vim). The primary aim is to assess the clinical response in relationship to neuroimaging changes, both at structural and functional level. All GK treatments are uniformly performed in our center using Guiot ’s targeting and a radiation dose of 130 Gy. MR neuroimagi...
Source: Stereotactic and Functional Neurosurgery - March 8, 2021 Category: Neurosurgery Source Type: research

Can Deep Brain Stimulation Withdrawal Syndromes Be Avoided by Removing Infected Implanted Pulse Generator and Cables with Contralateral Replacement in the Same Session?
Conclusion: One-session removal of an IPG and cables with contralateral replacement seems to be an effective therapy for patients at high risk of withdrawal syndrome.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - March 5, 2021 Category: Neurosurgery Source Type: research

A Stereotactic Device for Intraparenchymal Spinal Cord Injections: Latest Developments for Practical Clinical Use
This manuscript introduces the latest generation of a patient-mounted platform designed for segmental injections of therapeutics direct into the spinal cord parenchyma. It emphasizes its importance and it presents the rationale for developing this delivery methodology. It compares the newest with the previous generations, detailing how the modifications can streamline transportation, assembly, sterilization, and utilization of the platform by different surgeons. Finally, the illustrations depict the main alterations, as well as a cadaveric assessment of the device prototype in the cervical and thoracolumbar regions.Stereot...
Source: Stereotactic and Functional Neurosurgery - March 3, 2021 Category: Neurosurgery Source Type: research

Deep Brain Stimulation of Subgenual Cingulate Region for Treatment of an Early-Onset Conversion Disorder with Psychogenic Non-Epileptic Seizures and Prolonged Catatonia: Preliminary Results in One Patient
Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - February 10, 2021 Category: Neurosurgery Source Type: research

Preclinical Evaluation of the Stealth Autoguide Robotic Guidance Device for Stereotactic Cranial Surgery: A Human Cadaveric Study
Conclusion: These results compare the use of the Stealth Autoguide robotic guidance system with commonly used stereotactic devices, and this is the first study to compare its use and accuracy with the Leksell frame. These findings provide mounting evidence that Stealth Autoguide will have potential clinical uses in various stereotactic neurosurgical procedures.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - February 10, 2021 Category: Neurosurgery Source Type: research

ESSFN The Mission
Stereotact Funct Neurosurg 2021;99:92 –92 (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - February 9, 2021 Category: Neurosurgery Source Type: research

ASSFN Society News
Stereotact Funct Neurosurg 2021;99:91 –91 (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - February 9, 2021 Category: Neurosurgery Source Type: research

WSSFN Society News
Stereotact Funct Neurosurg 2021;99:90 –90 (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - February 9, 2021 Category: Neurosurgery Source Type: research

Frame-Based and Mask-Based Stereotactic Radiosurgery: The Patient Experience, Compared
Conclusions: Patients treated with MB SRS experience the procedure as more comfortable and less painful compared to those treated using a FB modality. Overall, this difference was not affected by a benign versus a malignant diagnosis and the treatment type is more indicative of the patient experience during SRS. A more homogenous sample between modalities and diagnoses and further follow-up with the patient ’s input on their experience would be beneficial.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - February 5, 2021 Category: Neurosurgery Source Type: research

CT and MRI Image Fusion Error: An Analysis of Co-Registration Error Using Commercially Available Deep Brain Stimulation Surgical Planning Software
Conclusions: The image fusion errors found in this analysis were nontrivial. Although the estimated error may be inflated, it is sig ­nificant enough that users must be aware of this potential inaccuracy, and developers of proprietary software should provide details about the magnitude and direction of co-registration errors.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - February 3, 2021 Category: Neurosurgery Source Type: research

Morphological Abnormalities in the Basal Ganglia of Dystonia Patients
Conclusions: BG morphology in primary dystonia differed from a control population. Volume reductions of the putamen and caudate may reflect functional degeneration, while volume increases of the GP may indicate overactivity. T2-hyperintensive SA in the GP of young primary dystonia patients, where microvascular lesions are highly unlikely, are striking. Their pathogenic role remains unclear.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - January 20, 2021 Category: Neurosurgery Source Type: research

Diffusion Tensor Imaging Color-Coded Maps: An Alternative to Tractography
Conclusion: CCMs provide a convenient, practical, and objective method of visualizing white matter tracts, obviating the need for potentially subjective and time-consuming tractography. CCMs are at least as reliable as tractograms in predicting neurological outcomes after neurosurgical intervention.Stereotact Funct Neurosurg (Source: Stereotactic and Functional Neurosurgery)
Source: Stereotactic and Functional Neurosurgery - January 18, 2021 Category: Neurosurgery Source Type: research