Table of Contents
Washington University Experience | NEOPLASMS (MENINGIOMA) | Rhabdoid | 14B1 Meningioma, atypical (Case 14) 20X 2
14B1-5 Sections of the right frontal/parietal tumor show a hypercellular neoplasm composed of cells with round to oval, uniform nuclei, occasional intranuclear clearing and a moderate amount of amphophilic to eosinophilic cytoplasm arranged in sheets with occasional whorls. Scattered cells show eccentrically placed eosinophilic cytoplasm, consistent with focal early rhabdoid differentiation. In some areas, the cells show an increased nuclear:cytoplasmic ratio consistent with small cell change. There are scattered psammoma bodies and multiple areas of micronecrosis. Mitoses are identified with a count reaching 6/10 high power fields.
