Stereotactic Staged Asymmetric Bilateral Radiofrequency Lesioning for Parkinson's Disease.

INTRODUCTION: Parkinson's disease (PD) is one of the most common neurodegenerative progressive disorders. Despite the dominance of neurostimulation technology, stereotactic lesioning operations play a significant role in the treatment of PD. The aim of the study was to evaluate the effectiveness and safety of staged bilateral asymmetric radiofrequency (RF) stereotactic lesioning in a highly selected group of PD patients. MATERIAL AND METHODS: A retrospective review of 418 consecutive patients undergoing stereotactic ablation for advanced PD at our institution revealed 28 patients who underwent staged asymmetric bilateral ablation. In this subset, after initial RF thalamotomy, contralateral pallidotomy was performed in 16 (57.1%) patients (group Vim-GPi), and contralateral lesion of the subthalamic nucleus (STN) was performed in 12 (32.9%) patients (group Vim-STN). The mean duration of disease before the first surgery was 9.9 ± 0.8 years. The mean interval between the two operations was 3.5 ± 0.4 years (range, 1-10 years); in the Vim-GPi group, it was 3.1 ± 0.4 years; and in the Vim-STN group, it was 4.3 ± 0.1 years. After the second operation, the long-term follow-up lasted from 1 to 8 years (mean 4.8 ± 0.5 years). All patients were evaluated 1 year after the second operation. RESULTS: One year after staged bilateral lesioning, the mean tremor score improved from baseline, prior to the first operation, from 19.8 to 3.8 (improvement of 81%), the overall mean rigidity score improved from 11.0 to 3.7 (improvement of 66%), and hypokinesia improved from 14.8 to 8.9 (improvement of 40%). One year after staged bilateral lesioning, the total UPDRS score improved in the Vim-GPi group by 47% in the OFF and 45.9% in the ON states. In the Vim-STN group, the total UPDRS score improved from baseline, prior to the first operation, by 44.8% in the OFF and 51.6% in the ON states. Overall, levodopa dose was reduced by 43.4%. Neurological complications were observed in 4 (14.3%) cases; among them, 1 (3.6%) patient had permanent events related to local ischemia after pallidotomy. CONCLUSION: Staged asymmetric bilateral stereotactic RF lesioning can be a safe and effective method in highly selected patients with advanced PD, particularly where deep brain stimulation is not available or desirable. Careful identification and selection of patients for ablative surgery allow achieving optimal results in the treatment of PD with bilateral symptoms.

The Co-Pilot Project: An International Neurosurgical Collaboration in Ukraine.

OBJECTIVE: We aim to provide a thorough description of the efforts and outcomes of the Co-Pilot Project in Ukraine, which facilitates neurosurgical collaboration between American and Ukrainian physicians. METHODS: The Co-Pilot Project, which operates under its parent nonprofit organization, Razom, organized multiple trips for American physicians to Ukraine. Activities included consulting in clinic, assisting with neurosurgical operations, and providing didactic lectures. Further efforts have included coordinating training opportunities for Ukrainian surgeons. We retrospectively reviewed all operations performed by Ukrainian partner physicians alongside American co-pilot physicians across Ukraine since August 2016. RESULTS: Teams of Ukrainian and American physicians operated on 78 patients (24 children and 54 adults) for a total of 84 procedures in 5 different cities (Kyiv, Lutsk, Lviv, Odessa, and Stryi) of Ukraine. Operations were classified into the following categories: adult brain tumors (n = 39), adult spine tumors (n = 1), epilepsy (n = 9), pain (n = 2), pediatric brain tumors (n = 11), vascular/endovascular (n = 10), and miscellaneous (n = 12). Four illustrative cases are described in detail. Of the patients with brain tumors, 43.5% (20/46) had giant tumors, and gross total resection or near-total resection was achieved in 78.3% (36/46). CONCLUSIONS: Profound disparities in neurosurgical care exist globally, which has led to the formation of collaborative relationships between physicians from various countries. We hope that the work of the Co-Pilot Project in Ukraine can serve as a template for effective international neurosurgical collaboration in other low-to-middle-income countries.