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Introduction: The phrase “think globally, act locally”, which has often been used to refer to conservation of the environment, highlights the importance of maintaining a holistic perspective and stipulates that each individual has a role to play in their community and larger world. Although peripheral nerve surgery has been largely unemphasized in global neurosurgical efforts, a wide disparity in peripheral nerve surgery is presumed to exist between high-income and low- and middle-income countries. Serbia is an upper middle-income country with a long history of peripheral nerve surgery. Research question: How can understanding the development of peripheral nerve surgery in Serbia advance global education and improve peripheral nerve surgery worldwide? Material and methods: An anecdotal and narrative review of recent advances in peripheral nerve surgery in Serbia was conducted. The World Federation of Neurosurgical Society (WFNS) Peripheral Nerve Surgery Committee discussions on improving peripheral nerve surgery education were summarized. Results: In this manuscript, we describe the application of “think globally, act locally” to peripheral nerve surgery by providing an account of the development of peripheral nerve surgery in Serbia. Then, we report measures taken by the WFNS Peripheral Nerve Surgery Committee to improve education on peripheral nerve surgery in LMICs. Discussion and conclusion: Viewing the development of peripheral nerve surgery in Serbia through the lens of “think globally, act locally” may guide the development of peripheral nerve surgery in LMICs.

Introduction: Cavernous malformations (CM) of the central nervous system constitute rare vascular lesions. They are usually asymptomatic, which has allowed their management to become quite debatable. Even when they become symptomatic their optimal mode and timing of treatment remains controversial. Research question: A consensus may navigate neurosurgeons through the decision-making process of selecting the optimal treatment for asymptomatic and symptomatic CMs. Material and methods: A 17-item questionnaire was developed to address controversial issues in relation to aspects of the treatment, surgical planning, optimal surgical strategy for specific age groups, the role of stereotactic radiosurgery, as well as a follow-up pattern. Consequently, a three-stage Delphi process was ran through 19 invited experts with the goal of reaching a consensus. The agreement rate for reaching a consensus was set at 70%. Results: A consensus for surgical intervention was reached on the importance of the patient's age, symptomatology, and hemorrhagic recurrence; and the CM's location and size. The employment of advanced MRI techniques is considered of value for surgical planning. Observation for asymptomatic eloquent or deep-seated CMs represents the commonest practice among our panel. Surgical resection is considered when a deep-seated CM becomes symptomatic or after a second bleeding episode. Asymptomatic, image-proven hemorrhages constituted no indication for surgical resection for our panelists. Consensus was also reached on not resecting any developmental venous anomalies, and on resecting the associated hemosiderin rim only in epilepsy cases. Discussion and conclusion: Our Delphi consensus provides an expert common practice for specific controversial issues of CM patient management.

Introduction: Peroneal nerve entrapment is a frequent cause of foot drop. Despite being frequent, no guidelines exist to recommend surgical or non-invasive treatment, leading to important variations in daily practice. Research question: To map variation in daily practice. Materials and methods: An online Qualtrics survey was distributed among neurosurgeons, neurologists, orthopaedic surgeons and physical medicine and rehabilitation physicians through various national and international scientific organizations, mapping current treatment strategies. Descriptive statistics and non-parametric tests were used to analyse data with SPSS. Results: Responses from 181 out of 221 participants from 35 countries were analysed. A large majority of participants agreed that good evidence supporting any treatment strategy is lacking (77.9%) and that daily practice is mostly guided by own beliefs and experience (84.0%). Both non-invasive treatment and neurolysis are well established treatment strategies (supported by respectively 92.3% and 93.4% of physicians). Timing of neurolysis and duration of non-invasive treatment varied considerably. Duration of non-invasive treatment was significantly shorter in the group of surgeons compared to non-surgeons (p ​= ​0.033). Most physicians consider neurolysis a valid treatment option. However, significant more non-surgeons than surgeons were opposed to surgical treatment (p ​= ​0.001). Discussion and conclusion: Important differences in attitudes were observed not only between, but also within specialisms, regardless of physician experience. This survey highlights important variations in daily practice for foot drop due to peroneal entrapment and emphasizes the need for future controlled studies.