Porokeratosis

From dermoscopedia

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 Editor: Aimilios Lallas

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Description This chapter describes the dermoscopy of porokeratosis
Author(s) Sabine Ludwig · Aimilios Lallas
Responsible author Aimilios Lallas→ send e-mail
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Status update July 11, 2017
Status by Ralph P. Braun


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Porokeratosis

In porokeratosis, the cornoid lamella, known as the histopathologic hallmark of porokeratosis, is revealed by dermoscopic examination as a well-defined, white-yellowish peripheral annular structure (“white track”, ‘‘the outlines of a volcanic crater as observed from a high point’’).[1][2][3][4]

In disseminated superficial actinic porokeratosis, the peripheral track may be hyperpigmented.[5][6][7] Depending on the disease subtype and the stage of progression, the central part of porokeratotic lesions can demonstrate a brownish pigmentation, dotted or linear vessels, or a structureless whitish area. By dermoscopy, the diagnosis of porokeratosis is performed without difficulty, even in clinically atypical cases.



References

  1. Delfino et al.: Dermoscopy for the diagnosis of porokeratosis. J Eur Acad Dermatol Venereol 2004;18:194-5. PMID: 15009303.
  2. Zaballos et al.: Dermoscopy of disseminated superficial actinic porokeratosis. Arch Dermatol 2004;140:1410. PMID: 15545557. DOI.
  3. Pizzichetta et al.: Clinical and dermoscopic features of porokeratosis of Mibelli. Arch Dermatol 2009;145:91-2. PMID: 19153357. DOI.
  4. Uhara et al.: Open pores with plugs in porokeratosis clearly visualized with the dermoscopic furrow ink test: report of 3 cases. Arch Dermatol 2011;147:866-8. PMID: 21768494. DOI.
  5. Zaballos et al.: Dermoscopy of disseminated superficial actinic porokeratosis. Arch Dermatol 2004;140:1410. PMID: 15545557. DOI.
  6. Oiso & Kawada: Dermoscopic features in disseminated superficial actinic porokeratosis. Eur J Dermatol 2011;21:439-40. PMID: 21680280. DOI.
  7. Panasiti et al.: Disseminated superficial actinic porokeratosis diagnosed by dermoscopy. Int. J. Dermatol. 2008;47:308-10. PMID: 18289344. DOI.