Abstract
This study describes the flow cytometric deoxyribonucleic acid (DNA) analysis of a resected ganglioglioma. The initial histopathological analysis revealed a benign tumor characterized by a predominance of mature ganglion cells. The flow cytometric DNA analysis of the necrotic areas, however, demonstrated an aneuploid population of cells. Further examination by histological analysis of the tumor revealed both benign and atypical foci. The retrospective DNA analysis performed from paraffin sections of tissue with benign-histological findings demonstrated euploid populations of cells consistent with a benign, slow-growing lesion. In contrast, DNA analysis performed from tissue with atypical histological findings revealed aneuploid populations of cells consistent with a malignant phenotype. Our analysis provides additional data supporting the existence of tumor progression in some gangliogliomas. Results support the concept of tumor cell heterogeneity and the importance of adequate tumor sampling. The finding of aneuploid populations with unfavorable histology further supports the use of flow cytometry as an adjunct method in assessing tumor biology.
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