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This epithelioid neoplasm looks like a meningioma, although no good meningothelial whorls are displayed. Furthermore, mitotic figures are easily seen, and many cells show prominent nucleoli. Depending on the mitotic count and whether other atypical features (small cells with high nucleocytoplasmic ratios, tumor necrosis, sheet-like growth pattern and hypercellularity) are found, this could be either WHO grade II atypical meningioma or WHO grade III malignant meningioma.
这个上皮样肿瘤像脑膜瘤,尽管没有形成明显的脑膜上皮旋涡。而且,核分裂像易见,许多细胞有明显核仁。基于核分裂像计数和是否存在其他不典型性的特征(高核浆比的小细胞,肿瘤坏死,片状生长,以及细胞丰富),此例可能是WHO III级不典型脑膜瘤或WHO II级恶性脑膜瘤。(abin译)
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