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. 2005 Jun 23;6(7):693–698. doi: 10.1631/jzus.2005.B0693

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(a) Low grade astrocytoma: Light and few expressions of eNOS in tumor cell, but comparatively strong in the vascular endothelial cells (immunohistochemical staining ×400); (b) Glioblastoma: eNOS strongly expressed in tumor cells (immunohistochemical staining ×400); (c) Glioblastoma: Glomerulus-like eNOS positive vascular structure (immunohistochemical staining ×400); (d) Anaplastic astrocytoma: Median expression of eNOS in tumor cells (immunohistochemical staining ×400); (e) Low grade astrocytoma: Light expression of VEGF in a few tumor cells, but obvious in the vascular endothelial cells (immunohistochemical staining ×400); (f) Anaplastic astrocytoma: Median expression of VEGF in tumor cells (immunohistochemical staining ×400)