What is porokeratosis?

Updated: Oct 09, 2020
  • Author: Amarateedha Prak LeCourt, MD; Chief Editor: William D James, MD  more...
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Porokeratosis is a clonal disorder of keratinization characterized by one or more atrophic patches surrounded by a clinically and histologically distinctive hyperkeratotic ridgelike border called the cornoid lamella. Historically, porokeratosis is a misnomer that was erroneously coined on the assumptions that cornoid lamellae emerged from pores of the sweat glands. [1] Multiple clinical variants of porokeratosis are recognized. Malignancies, typically squamous cell carcinomas, may develop within lesions of porokeratosis.

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