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Figure 1: (a) Astrocytoma on left with normal glial tissue (right) (hematoxylin and eosin ×200). (b) Positive expression of WT1 is seen in tumor. Normal glial tissue (arrow) is negative. Positive internal control is seen in the capillaries (immunohistochemistry ×200)

Figure 1: (a) Astrocytoma on left with normal glial tissue (right) (hematoxylin and eosin ×200). (b) Positive expression of <i>WT1</i> is seen in tumor. Normal glial tissue (arrow) is negative. Positive internal control is seen in the capillaries (immunohistochemistry ×200)