Although more than 12 years have passed since publication of the first WHO histological classification of central nervous system (CNS) tumours, the changes in this revised edition are not radical. Only one formerly recognized entity has been deleted: the monstrocellular sarcoma, because there is immuno cytochemical evidence of its astrocytic nature. Several new tumour types have been added: the pleomorphic xanthoastro cytoma has been generally acknowledged for almost a decade; the neurocytoma has gradually evolved as a clinical-pathological entity; and two new entries, the dysembryoplastic neuroepi thelial tumour and the desmoplastic infantile ganglioglioma, have only been characterized morphologically during the past few years. We regard the classification as an international standard to facilitate communication and have tried to avoid current con ceptual controversies. The majority of partiCipants supported inclusion of the term "primitive neuroectodermal tumour" (pNET). However, because of our limited knowledge of the biol ogy of embryonal CNS tumours, preference was given to use PNET selectively, rather than applying it to all small cell embryo nal childhood tumours, irrespective of their histological pheno type. Ependymomas and meningiomas now have new histological SUbtypes. Most of these are not associated with biological behaviour different from the parent tumour type, but their description will aid the practising pathologist to identify and classify these lesions. 2 Introduction Histological Typing Following the philosophy of this WHO series, classification is based primarily on histological assessment of cell types and tis sue patterns recognized by conventional light microscopy.
- World Health Organization, International Histological Classification of Tumours
- Verlag: Springer, Berlin
- 2nd ed.
- Seitenzahl: 132
- Erscheinungstermin: 30. Juli 1993
- Abmessung: 241mm x 174mm x 10mm
- Gewicht: 318g
- ISBN-13: 9783540569718
- ISBN-10: 3540569715
- Artikelnr.: 26051585
Introduction Histological Classification of CNS Tumours Definitions and Explanatory Notes Tumours of Neuroepithelial Tissue Astrocytic Tumours Ependymal Tumours Mixed Gliomas Choroid Plexus Tumours Neuroepithelial Tumours of Uncertain Origin Neuronal and Mixed Neuronal-Glial Tumours Pineal Parenchymal Tumours Embryonal Tumours Tumours of Cranial and Spinal Nerves Schwannoma Neurofibroma Malignant Peripheral Nerve Sheath Tumor Tumours of the Meninges Tumours of Menigothelial Cells Mesenchymal, Non-menigothelial Tumours Primary Melanocytic Lesions Lymphomas and Haemopoietic Neoplasms Germ Cell Tumours Cysts and Tumour-like Lesions Tumours of the Sellar Region Local Extensions from Regional Tumours Metastatic Tumours Unclassified Tumours Illustrations Subject Index Metat Cy Tu
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