Miscellaneous Tumors and Tumor-Like Conditions Main Text Preamble Some important neoplasms that affect the calvaria, skull base, and cranial meninges are not included in the 2021 5th edition WHO classification…
Adult-Type Diffuse Gliomas Main Text Preamble Gliomas, glioneuronal tumors, and neuronal tumors are the most common and most varied neoplasms that affect the brain parenchyma. Of the six different groups…
Anomalies of the Skull and Meninges Main Text Preamble Anomalies of the skull and meninges represent maldevelopment of the embryonic mesenchyme. These include cephaloceles, congenital calvarial defects, and other meningeal…
Hematolymphoid and Hematopoietic Tumors Main Text Preamble This chapter focuses on hematopoietic tumors and tumor-like conditions. We begin with an increasingly common group of neoplasms, lymphomas and related disorders, then…
Choroid Plexus Tumors Main Text Preamble The 5th edition WHO separates choroid plexus tumors from gliomas, glioneuronal tumors, and neuronal tumors. Choroid plexus neoplasms are now considered as their own…
Holoprosencephalies, Related Disorders, and Mimics Main Text Preamble Holoprosencephalies and variants, such as syntelencephaly, are classified as anomalies of ventral prosencephalon development. Other anomalies of the ventral prosencephalon include septo-optic…
Pediatric-Type Diffuse High-Grade Gliomas Main Text Preamble In recent years, with the advent of molecular diagnosis, our classification of pediatric high-grade gliomas has moved from a histology-based (e.g., “glioblastoma”) and…
Pediatric-Type Diffuse Low-Grade Gliomas Main Text Preamble The 5th edition WHO classification of CNS tumors groups many neoplasms into tumor “families.” By far, the largest, most varied tumor family is…
Approach to Nontraumatic Hemorrhage and Vascular Lesions Main Text Preamble This part devoted to “spontaneous” (i.e., nontraumatic) hemorrhage and vascular lesions begins with a general discussion of brain bleeds. Subsequent…
