This article provides a brief review of the 2007 World Health Organization (WHO) classification of tumors of the central nervous system. The classification is divided into three categories: clinico-pathological entities, variants of entities, and histological patterns. Eight new entities and three new variants were included in the 2007 edition. The new entities include angiocentric glioma, atypical choroid plexus papilloma, extraventricular neurocytoma, papillary glioneuronal tumor, rosette-forming glioneuronal tumor of the IV ventricle, papillary tumor of the pineal region, pituityctoma, and spindle cell oncocyctoma of the adenohypophysis. The new variants are pilomyxoid astrocytoma, anaplastic medulloblastoma, and medulloblastoma with extensive nodularity. Each entity and variant is characterized by distinct features such as morphology, location, age distribution, and biological behavior. The article also discusses the imaging characteristics of these tumors, particularly MR imaging findings.This article provides a brief review of the 2007 World Health Organization (WHO) classification of tumors of the central nervous system. The classification is divided into three categories: clinico-pathological entities, variants of entities, and histological patterns. Eight new entities and three new variants were included in the 2007 edition. The new entities include angiocentric glioma, atypical choroid plexus papilloma, extraventricular neurocytoma, papillary glioneuronal tumor, rosette-forming glioneuronal tumor of the IV ventricle, papillary tumor of the pineal region, pituityctoma, and spindle cell oncocyctoma of the adenohypophysis. The new variants are pilomyxoid astrocytoma, anaplastic medulloblastoma, and medulloblastoma with extensive nodularity. Each entity and variant is characterized by distinct features such as morphology, location, age distribution, and biological behavior. The article also discusses the imaging characteristics of these tumors, particularly MR imaging findings.