Abstract
SUMMARY: The WHO Classification of Tumors of the Central Nervous System has become the worldwide standard for classifying and grading brain neoplasms. The most recent edition (WHO 2007) introduced a number of significant changes that include both additions and redefinitions or clarifications of existing entities. Eight new neoplasms and 4 new variants were introduced. This article reviews these entities, summarizing both their histology and imaging appearance. Now with more than 3 years of clinical experience following publication of the newest revision, we also ask, “What can the neuroradiologist really say?” Are there imaging findings that could suggest the preoperative diagnosis of a new tumor entity or variant?
ABBREVIATIONS:
- aCPP
- atypical choriod plexus papilloma
- CNS
- central nervous system
- CPP
- choriod plexus papilloma
- CPCa
- choriod plexus carcinoma
- DNET
- dysembryoplastic neuroepithelial tumor
- EVNCT
- extraventricular neurocytoma
- MB
- medulloblastoma
- MBEN
- medulloblastoma with extensive nodularity
- PA
- pilocytic astrocytoma
- PGNT
- papillary glioneuronal tumor
- PMA
- pilomyxoid astrocytoma
- PPTID
- pineal parenchymal tumor of intermediate differentiation
- PTPR
- papillary tumor of the pineal region
- RGNT
- rosette-forming glioneuronal tumor
- SCO
- spindle cell oncocytoma
- T1C+
- post-contrast T1-weighted
- T1WI
- T1-weighted imaging
- T2WI
- T2-weighted imaging
- WHO
- World Health Organization
- © 2012 by American Journal of Neuroradiology
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