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Figure 4: Leptomeningeal tissue obtained from the optic chiasm of a cadaveric specimen, when viewed under 1,000 × magnification. (a) Hematoxylin and eosin staining shows serpiginous clusters of brownish pigmented cells (black arrows). (b) On Melan-A immunohistochemistry, the pigment stains dense brown in color (black arrows) over a blue background

Figure 4: Leptomeningeal tissue obtained from the optic chiasm of a cadaveric specimen, when viewed under 1,000 × magnification. (a) Hematoxylin and eosin staining shows serpiginous clusters of brownish pigmented cells (black arrows). (b) On Melan-A immunohistochemistry, the pigment stains dense brown in color (black arrows) over a blue background