Home > E. Pathology by systems > Skin > porokeratosis
porokeratosis
Tuesday 10 July 2012
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Definition: Porokeratosis is a specific disorder of keratinization that is characterized histologically by the presence of a cornoid lamella, a thin column of closely stacked, parakeratotic cells extending through the stratum corneum with a thin or absent granular layer.
Images
Prominent hypekeratosis with well-developed cornoid lamellae in porokeratosis of Mibelli
- https://twitter.com/Valdebran/status/747399163248152576
- https://twitter.com/JRamirezMD/status/828667696065740801
- https://twitter.com/JMGardnerMD/status/875529619864260613
Types
classic porokeratosis of Mibelli
disseminated superficial actinic porokeratosis
disseminated superficial porokeratosis
porokeratosis palmaris et plantaris disseminata
linear porokeratosis
punctate porokeratosis
porokeratosis plantaris discreta
Synopsis
cornoid lamella
dying keratinocytes at base of lamella
vacuoles at base of lamella
See also
- kertatoses