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基本説明
Aims to illustrate the pitfalls most frequently encountered today in the practical activity of diagnosis and also of prognosis. The initial chapters cover the distinction between infiltrating tumors and normal nervous tissue, between diffuse astrocytoma and oligodendroglioma and the identification of the malignant variant of some tumor types. Moreover, in the pathology of brain tumors, some biological processes are active which show a development over the course of time, such that in surgical samples they cannot be recognized as a whole, but only from the occurrence of limited and partial aspects. Invasion modalities, angiogenesis and apoptosis fall in this category and are discussed not in an exhaustive manner, but as stages or phases of the processes identified in the tissue.
Full Description
Since Bailey and Cushing (1926), all brain tumor classifications have been called histogenetic. The nosographic position that the tumor types progressively acquired in the classification systems derived from the resemblance of tumor cells to those of the cytogenesis, modified whenever new information became available from different biological research fields and especially from molecular genetics. Classically, on the basis of the rough correspondence between the mature/immature aspect of tumor cells and the benign/malignant biological behavior of the tumors, the histological labels contained a prognostic significance. The supposed origin of the tumors was thus a factor for prognosis. Later on, with the concept of anaplasia (Cox, 1933; Kernohan et al., 1949) new criteria were introduced for establishing the malignancy grades of tumors. Immunohistochemistry and later molecular genetics further refined the prognostic diagnoses, substantially increasing the opportunities to recognize the cell origin of tumors, beside revealing the pathogenetic mechanisms. Prognoses became more accurate, as required by the greater and more targeted possibilities of therapy.
Contents
The Origin of Gliomas in Relation to the Histological Diagnosis.- Molecular Genetics Outline of Brain Tumors.- General Remarks.- Astrocytic Tumors I.- Astrocytic Tumors II.- Oligodendroglial Tumors.- Ependymal Tumors.- Neuronal and Mixed Glio-Neural Tumors I.- Neuronal and Mixed Glio-Neural Tumors II.- Peculiar Tumors.- Cell Migration and Invasion.- Apoptosis.- The Ubiquitin-Proteasome System.- Angiogenesis.- Meningiomas.
