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Micro:
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Hyperkeratosis, parakeratosis, acute
neutrophilic keratitis (Munro’s microabscess);
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Hypogranulosis, acanthosis with round or
square-shaped rete ridges;
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Suprapapillary thinning of epidermis;
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Neovascularization of dermal papillae
(Remember Auspitz’s sign? removal of scale shows blood
droplets).
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