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Figure 2: (a-i): AQP1 immunoreactivity in primary CNS tumors: lowgrade astrocytoma showing intratumoral upregulation (a: ×100) as compared to peritumoral areas (b: ×40); GBM (c: ×40) (d: ×100) and anaplastic ependymoma (f: ×40) (g: ×40) showing lower expression in intratumoral location as compared to peritumoral areas; fibroblastic meningioma displaying cytoplasmic and membrane reactivity (e: ×400); PNET showing immunonegativity with upregulation in the peritumoral tissue (h: ×40); hemorrhagic stroke (control) showing endothelial and perivascular diffuse immunopositivity (i: ×100)

Figure 2: (a-i): AQP1 immunoreactivity in primary CNS tumors: lowgrade astrocytoma showing intratumoral upregulation (a: ×100) as compared to peritumoral areas (b: ×40); GBM (c: ×40) (d: ×100) and anaplastic ependymoma (f: ×40) (g: ×40) showing lower expression in intratumoral location as compared to peritumoral areas; fibroblastic meningioma displaying cytoplasmic and membrane reactivity (e: ×400); PNET showing immunonegativity with upregulation in the peritumoral tissue (h: ×40); hemorrhagic stroke (control) showing endothelial and perivascular diffuse immunopositivity (i: ×100)