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Case Reports
. 2016 Sep-Oct;91(5 suppl 1):119-121.
doi: 10.1590/abd1806-4841.20164479.

Porokeratosis simulating Bowen's disease on dermoscopy

Alzinira Sousa Herênio  1 , Silvana Maria de Morais Cavalcanti  2 , Emmanuel Rodrigues de França  2 , Clarissa Marques Maranhão  1 , Eliane Ruth Barbosa de Alencar  2
Affiliations
Case Reports

Porokeratosis simulating Bowen's disease on dermoscopy

Alzinira Sousa Herênio et al. An Bras Dermatol. 2016 Sep-Oct.

Abstract

Porokeratosis is a disorder of epidermal keratinization characterized by the presence of annular hyperkeratotic plaques. Its etiopathogenesis is not yet fully understood, but a relationship with immunosuppression has been reported. Dermoscopic examination revealed a classic yellowish-white ring-like structure that resembled "volcanic crater contour" - the so-called cornoid lamella. We describe a case of porokeratosis in a female patient with chronic lymphedema, which was similar to Bowen's disease due to the many glomerular vessels seen on clinical examination and dermoscopy.

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Conflict of interest statement

Conflict of Interest: None

Figures

Figure 1
Figure 1
Lymphedema on the left forearm with an erythematous plaque lesion and keratotic border
Figure 2
Figure 2
Edematous skin with an erythematous plaque lesion and keratotic border on the left forearm
Figure 3
Figure 3
Dermoscopy: presence of abundant glomerular vessels throughout the lesion with an erythematous background and keratotic border
Figure 4
Figure 4
Histopathology: cornoid lamella (black arrow) and absence of cell atypia (HE)
See this image and copyright information in PMC

References

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