Brain tumors remain among the most complex and life-threatening neoplasms affecting the central nervous system with significant implications for patients' survival neurological function and quality of life. The increasing global incidence and heterogeneity of brain tumors - both in histopathology and clinical presentation - underscore the urgent need for timely diagnosis accurate classification and effective therapeutic strategies. In recent years the role of digital tools and artificial intelligence (AI) in facilitating medical research and clinical decision-making has grown exponentially. One such promising development is Research Assist a conceptual or real-time tool designed to streamline rapid literature reviews synthesize evidence and enhance the research workflow. This book has 7 chapters including: Introduction;Chapter IIntra axial brain tumors in adult;Chapter 2Intra axial brain tumors in pediatric;Chapter 3Skull base tumors;Chapter 4Sella and parasailer tumors;Chapter 5Pineal region tumors;Chapter 6Intraventricular brain tumors;Chapter 7Cp angle brain tumors.