Pustular porokeratosis

Abstract

We report a case of disseminated superficial actinic porokeratosis (DSAP) with neutrophilic pustules within cornoid lamellae on histopathologic examination, corresponding to pustules along the elevated rim clinically as well. A review of the literature identified only one other case in which pustules have been associated with porokeratosis. Our case represents an unusual variant of DSAP, which may make an ordinarily straightforward clinical diagnosis more challenging.

A case of bullous eruptive disseminated porokeratosis

“…EDP is an uncommon, rapidly evolving variant of porokeratosis . If distributed in sun‐exposed areas, the lesions may be described as disseminated superficial actinic keratoses (DSAP) . Although lesions of EDP are pleomorphic, often with uncharacteristic morphology for porokeratosis, secondary bullous changes are not typically seen.…”

“…Although lesions of EDP are pleomorphic, often with uncharacteristic morphology for porokeratosis, secondary bullous changes are not typically seen. There is one case of bullous porokeratosis and one case of pustular porokeratosis reported in the literature. The bullous changes in our case are suspected to be secondary to edema causing accumulation of interstitial fluid localized only to areas affected by porokeratosis, as in locus minoris resistentiae.…”