The ependymomas, grade II cellular types, were intermixed with or separate from wavy, vaguely fascicular tissue that contained multiple axons immunoreactive for neurofilament protein.

• 室管膜瘤，肿瘤细胞级别为2级，瘤细胞与波浪状的丛状组织相间或相离，这些丛状组织含多样的神经轴突，后者与神经丝蛋白发生免疫反应。