WHO Classification of CNS Tumors (General Principles)

This chapter delves into the structured framework of the World Health Organization (WHO) classification of central nervous system CNS tumors. This chapter provides a systematic exploration of the major tumor groups, covering the distinct types and subtypes within the pineal tumors as well as the gliomas, glioneuronal and neuronal tumors categories. It further elucidates the various subtypes of ependymal tumors and delves into the classification of medulloblastoma subtypes. The chapter also addresses various cranial and paraspinal nerve tumors, tumors found in the sellar region, and the different types of extra-axial intracranial cysts. Furthermore, the chapter highlights the incidence patterns of specific tumor types/subtypes. This chapter offers a thorough understanding of the WHO classification of CNS tumors, providing a structured foundation for the field of neuro-oncology.