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Why does psoriasis sometimes look white?

Psoriasis is an inflammatory disorder, with a greatly increased blood flow to plaques. So why does is sometimes look white? Is there a 'white chromophore'? Or is there another explanation?

From  Jonathan Rees on June 15th, 2016 0 likes 59 plays 0  

Why is 'brown' melanin blue?

(Very) short explanation of why some melanocytic nevi look blue

From  Jonathan Rees on June 15th, 2016 0 likes 60 plays 0