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  Indian J Med Microbiol
 

Figure 1: (a) (Left): Photomicrograph - Multiple keratin horn cysts (arrow) were seen in the downgrowth of epidermis. The tips of rete ridges showed pronounced hyperpigmentation (H and E, ×400). Inset shows gross picture showing hyperpigmentation in the back of the hands and intertriginous folds between digits. (b) (Right) Photomicrograph - Epidermis shows hyperkeratosis, irregular acanthosis with focal filiform downgrowth of epidermis (arrow) (H and E, ×100).

Figure 1: (a) (Left): Photomicrograph - Multiple keratin horn cysts (arrow) were seen in the downgrowth of epidermis. The tips of rete ridges showed pronounced hyperpigmentation (H and E, ×400). Inset shows gross picture showing hyperpigmentation in the back of the hands and intertriginous folds between digits. (b) (Right) Photomicrograph - Epidermis shows hyperkeratosis, irregular acanthosis with focal filiform downgrowth of epidermis (arrow) (H and E, ×100).