The rare seemingly papillary structures may be found in meningioma (amianthoid fibers) as well as in some astrocytomas and mixed glioneuronal tumors.

• 这些稀疏的表面上看起来的乳头状结构可以见于脑膜瘤（海绵样纤维）以及某些星形细胞瘤及神经元胶质混合肿瘤。