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Figure 3: (a) Pilocytic astrocytoma showing piloid cells with compact and loose pattern (hematoxylin and eosin ×400). (b) WT1 immunohistochemistry positivity showing mixed pattern with compact areas (arrow) and loose areas (small arrow) (immunohistochemistry ×200)

Figure 3: (a) Pilocytic astrocytoma showing piloid cells with compact and loose pattern (hematoxylin and eosin ×400). (b) <i>WT1</i> immunohistochemistry positivity showing mixed pattern with compact areas (arrow) and loose areas (small arrow) (immunohistochemistry ×200)