Porokeratosis is a rare, genetically determined disorder of epidermal keratinization characterized by lesions with keratotic borders corresponding histopathologically to compact columns of parakeratotic cells called cornoid lamellae that extend through the stratum corneum.1 The clinical variants include porokeratosis of Mibelli (PM), disseminated superficial actinic porokeratosis, linear porokeratosis, porokeratosis palmaris, plantaris et disseminate, and punctate porokeratosis.1
Pizzichetta MA, Canzonieri V, Massone C, Soyer HP. Clinical and Dermoscopic Features of Porokeratosis of Mibelli. Arch Dermatol. 2009;145(1):91–92. doi:10.1001/archderm.145.1.91
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