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Case Reports
. 2016 Sep-Oct;91(5 suppl 1):134-136.
doi: 10.1590/abd1806-4841.20164399.

Porokeratosis ptychotropica

Ana Carolina Franco Tebet  1 , Tatiana Gandolfi de Oliveira  1 , Anna Rita Ferrante Mitidieri de Oliveira  1 , Fabiolla Sih Moriya  1 , Jayme de Oliveira Filho  1 , Luiz Carlos Cucé  1
Affiliations
Case Reports

Porokeratosis ptychotropica

Ana Carolina Franco Tebet et al. An Bras Dermatol. 2016 Sep-Oct.

Abstract

Porokeratosis is a skin disorder clinically characterized by annular plaques with keratotic borders resembling the Great Wall of China and histopathologically by cornoid lamellae. The disease has several clinical variants. Porokeratosis ptychotropica, which has recently become part of these variants, is quite rare and little known. The entity is characterized by verrucous plaques - which may resemble a psoriasis plaque - that affect the regions of the buttocks, most commonly the gluteal cleft, with or without extremity involvement. Itching is often present. We report a rare case of porokeratosis ptychotropica and highlight its unusual manifestation (single plaque), the first case reported in the Brazilian literature.

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Conflict of interest statement

Conflict of Interest: None

Figures

Figure 1
Figure 1
Patient presented with oval erythematous plaque with vegetating surface, slightly hypochromic and with well-defined rete ridge-like edges in the gluteal region
Figure 2
Figure 2
Greater detail of the oval erythematous plaque with vegetating surface, slightly hypochromic and with well- defined rete ridge-like edges
Figure 3
Figure 3
Histopathology (HE staining 40x) revealed regular thickening of the skin with mild papillomatosis and agranulosis sections topped by broad parakeratotic columns, featuring cornoid lamellae
See this image and copyright information in PMC

References

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