Which physical findings are characteristic of parapsoriasis?

Updated: Sep 04, 2019
  • Author: Henry K Wong, MD, PhD; Chief Editor: Dirk M Elston, MD  more...
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Answer

Lesions of small plaque parapsoriasis are well-circumscribed, slightly scaly, light salmon-colored patches that measure less than 5 cm in diameter and are scattered over the trunk and extremities. Digitate pattern is a distinctive form of small plaque disease that consists of palisading elongated fingerlike patches that follow the dermatome and are most prominently displayed on the lateral thorax and abdomen. [14] (See the images below.)

Small plaque parapsoriasis. Small plaque parapsoriasis.
Small plaque parapsoriasis. Small plaque parapsoriasis.

Large plaque parapsoriasis manifests as faint erythematous patches with arcuate geographic borders. Each lesion often is greater than 6 cm in diameter. Lesions are scattered on the proximal extremities and the trunk and often show a bathing-suit distribution. Surfaces of the lesions have a faint red-to-salmon color; show flaky thin scales; and have an atrophic, cigarette-paper or tissue-paper, wrinkling quality. (See the image below.)

Large plaque parapsoriasis. Large plaque parapsoriasis.

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