Co-Existence of Porokeratosis Variants Concurrent with Bowen’s Disease: Two Rare Cases Report

Tarinee Korviriyakamol MD*, Pinnaree Kattipathananpong MD*, Chakkrapong Chunhasewee MD*, Vesarat Wessagowit MD, PhD*, Tanawatt Kootiratrakarn MD, PhD*

Affiliation : * Institute of Dermatology, Department of Medical Services, Ministry of Public Health, Bangkok, Thailand

Coexisting variants of porokeratosis rarely occurs. Disseminated superficial porokeratosis (DSP) is characterized by multiple uniform small annular papules distributed all over body. DSP commonly coexist with linear porokeratosis (LP), but it is uncommon for DSP to coexist with porokeratosis of Mibelli (PM). PM presents with central atrophic erythematous plaques and thread-like elevated border. It occurs mainly on extremities. Although malignant transformation can be found in the porokeratosis, there is still no report case of coexisting variants of porokeratosis concurrent with Bowen’s disease. The clinical and histopathologic finding of rare coexisting variants of porokeratosis (PM and DSP) concurrent with squamous dysplasia is described.

Keywords : Porokeratosis of Mibelli, Disseminated superficial porokeratosis, Bowen’s disease

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