Fast Five Quiz: Plaque Psoriasis

William James, MD


June 09, 2021

Pruritus is one of the main symptoms of plaque psoriasis. Although it varies in intensity, it should not be disregarded. Emotional instability (eg, high levels of anxiety, depression) can be engendered by psoriasis and frequently manifests as an increased tendency to scratch.

Psoriatic plaques are well defined and have sharply demarcated boundaries. In addition, psoriatic plaques sometimes appear to be immediately encircled by a paler peripheral zone, which is referred to as the halo or ring of Woronoff.

Nail changes are variable but common in patients with plaque psoriasis. Nails may show pitting, onycholysis, subungual hyperkeratosis, or the oil-drop sign.

Psoriatic plaques have a propensity for symmetrical distribution over the body. Lesions are normally highly uniform, with few morphologic differences between the two sides.

Learn more about the signs and symptoms of plaque psoriasis.


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