This issue of Neurosurgery Clinics of North America is devoted to "Advances in Neuromodulation." Editors Won Kim, MD, Antonio De Salles, MD, and Nader Pouratian, MD have assembled the top experts to review topics such as: peripheral nerve stimulation; spinal cord stimulation for gait reanimation and vascular pathology; deep brain stimulation for Tourettes, OCD, depression, Parkinson’s disease, eating disorders, dystonia, and headache; and techniques for image-guided deep brain stimulation, advanced imaging for targeting, and closed loop neuromodulation.

This issue of Surgical Oncology Clinics of North America focuses on Biliary Tract and Primary Liver Tumors and is edited by Dr. T. Clark Gamblin. Articles will include: Biliary Tract and Primary Liver Tumors; Biliary Tract and Primary Liver Tumors: Who, What and Why?; Imaging Updates for Biliary Tract or Primary Liver Tumors; Endoscopic and Percutaneous Approaches to Treat of Biliary Tract and Primary Liver Tumors: Controversies and Advances; Intrahepatic Cholangiocarcinoma: Strategies and Options; Surgical Considerations of Hilar Cholangiocarcinoma; Gall Bladder Cancer: Managing the Incidental Diagnosis; Approaches and Outcomes to Distal Cholangiocarcinoma; Evolving Surgical Options of Hepatocellular Carcinoma; Staging of Biliary and Primary Liver Tumors: Current Reccomendations and Workup; Systemic and Targeted Therapy for Biliary Tract Tumors and Primary Liver Tumors; Regional Chemotherapy for Biliary Tract and Primary Liver Cancer; Role of Radioembolization for Biliary Tract and Primary Liver Cancer; Inoperable Biliary Tract and Primary Liver Tumors: Palliative Treatment Options; Expanding the Surgical Pool for Hepatic Resection to Treat Biliary and Primary Liver Tumors; and more!

This issue of the Neurosurgery Clinics of North America devoted to Intracranial Stereotactic Radiosurgery is Guest Edited by Dr. Bruce Pollock of the Mayo Clinic in Rochester, Minnesota. Articles in this issue include: Concepts and Techniques of Intracranial Stereotactic Radiosurgery; Stereotactic Radiosurgery of Intracranial Meningiomas; Stereotactic Radiosurgery of Pituitary Adenomas; Stereotactic Radiosurgery of Vestibular Schwannomas; Stereotactic Radiosurgery of Non-Vestibular Schwannomas; Multi-session Radiosurgery of Benign Intracranial Tumors; Stereotactic Radiosurgery of Intracranial Gliomas; Stereotactic Radiosurgery of Brain Metastases; Stereotactic Radiosurgery of Chordomas, Chondrosarcomas, and Glomus Tumors; Stereotactic Radiosurgery of Intracranial Arteriovenous Malformations; Stereotactic Radiosurgery of Intracranial Dural Arteriovenous Fistulas; Stereotactic Radiosurgery of Intracranial Cavernous Malformations; Stereotactic Radiosurgery for Trigeminal Neuralgia; and Stereotactic Radiosurgery for Epilepsy and Functional Disorders.

This issue of Neurosurgery Clinics of North America is devoted to "Minimally Invasive Spine Surgery" and is edited by Zachary A. Smith, MD and Richard G. Fessler, MD, PhD. Articles in this issue include: Complications and complication avoidance of minimally invasive spine surgery; Radiation exposure risk and avoidance; Current techniques in the management of cervical myelopathy and radiculopathy; Thoracic disc/pathology management through minimally invasive routes; Transforaminal Lumbar Interbody fusion: Long term outcomes and complications; Computer-assisted navigation technique for minimally invasive transforaminal lumbar interbody fusion and lateral interbody fusion; Safety and the Anatomy of the retroperitoneal lateral corridor; Minimally invasive extracavitary transpedicular corpectomy for the management of spinal tumors; Minimally invasive anterolateral corpectomy for spinal tumors; Minimally invasive approaches for the management of intramedullary spinal tumors; Percutaneous fixation of thoracolumbar fractures; Advances and feasibility of advanced minimally invasive techniques in deformity correction; Direct lateral approach: Outcomes and Deformity Correction; and Evidence basis and outcomes.

Central neurocytoma is a tumor of young adults composed of uniform round cells with neuronal differentiation, typically occurring in the lateral ventricles in the region of the foramen of Monro. Neurocytomas is a hot topic in neuro oncology especially with modern developments of radiation and novel chemotherapy agents.

This issue provides a glimpse into how pain can be assessed and managed by several medical disciplines and approaches. It covers classical and conventional techniques as well as innovative techniques.

This issue serves as a high-level topic review and keeps the readers updated on current and future neurointervention directions.