Psoriasiform and spongiotic dermatitis

Published on 08/03/2015 by admin

Filed under Dermatology

Last modified 08/03/2015

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Chapter 8

Psoriasiform and spongiotic dermatitis

Psoriasis

The appearance of psoriasis depends on the stage of the lesion and type of lesion. Early guttate lesions demonstrate no acanthosis. Established plaques demonstrate a characteristic pattern of regular acanthosis. Pustular psoriasis may never demonstrate acanthosis. Acral and intertriginous lesions of psoriasis commonly demonstrate a background of spongiosis, but spongiosis is distinctly absent from the surrounding epidermis in most other locations. Reiter’s disease and geographic tongue histologically look like psoriasis.

Pustular psoriasis

Pearl

Subcorneal pustules: Candida, acropustulosis of infancy, transient neonatal pustular melanosis, Sneddon–Wilkinson (and IgA pemphigus), impetigo, pustular psoriasis, Staphylococcus scalded-skin syndrome (CAT SIPS, or an anagram of SIPS)