actinic porokeratosis

ac·tin·ic po·ro·ker·a·to·sis

a lesion that occurs on exposed areas of extremities primarily; bears a resemblance to actinic keratosis, but the histologic features are those of porokeratosis.
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In the clinical presentation of porokeratosis, there were five subtypes identified:[1] (a) Porokeratosis of Mibelli (PM), (b) disseminated superficial actinic porokeratosis, (c) porokeratosis palmaris et plantaris disseminate, (d) linear subtype, and (e) punctate type of porokeratosis.
PK is classified as porokeratosis of Mibelli (PM), disseminated superficial porokeratosis of immunosuppression and childhood, disseminated superficial actinic porokeratosis (DSAP), linear and punctate forms, porokeratosis palmaris et plantaris disseminate, giant PK, and less common PP.
Clinical types include porokeratosis of Mibelli (PM), disseminated superficial PK, disseminated superficial actinic porokeratosis (DSAP), facial PK, and ptychotropica porokeratosis (PP).
Five clinical variants are recognized: disseminated superficial actinic porokeratosis and its non actinic variant, classic porokeratosis of Mibelli, linear porokeratosis, porokeratosis palmaris et plantaris disseminata and punctate porokeratosis [2].
These include classic porokeratosis of Mibelli, Disseminated superficial actinic porokeratosis, punctate porokeratosis, porokeratosis palmaris et plantaris disseminate and linear Porokeratosis.1 Atypical types are facial and giant porokeratosis, porokeratosis ptychotropica and porokeratoma.
Two closely linked variations in actin cytoskeleton pathway in a Chinese pedigree with disseminated superfi cial actinic porokeratosis. J Am Acad Dermatol 2005; 52: 972-6.
A Chinese research team, led by Anhui Medical University and BGI, has found the strong genetic evidences of mevalonate kinase gene (MVK) mutations link to disseminated superficial actinic porokeratosis (DSAP).
Several clinical variants have been identified, including porokeratosis of Mibelli (PM), disseminated superficial porokeratosis of immunosuppression and childhood, disseminated superficial actinic porokeratosis (DSAP), linear and punctate forms, porokeratosis palmaris et plantaris disseminate, giant porokeratosis, and porokeratosis ptychotropica (1).
Disseminated superficial actinic porokeratosis (DSAP) is characterized by small, atrophic patches with distinctive keratin rims that occur on sun-exposed areas of the extremities, shoulders, and back.
Porokeratosis of Mibelli (PM) disseminated superficial actinic porokeratosis porokeratosis palmaris plantaris et disseminata (PPPD) linear porokeratosis punctate porokeratosis.
There are six different types of porokeratosis: Porokeratosis of Mibelli (PM), giant porokeratosis, linear porokeratosis (LP), disseminated superficial actinic porokeratosis (DSAP), palmoplantar po-rokeratosis (PPP), and punctate porokeratosis (PP) (3).
Herein, we report a case of rare coexistence of unilateral linear punctate porokeratosis and ipsilateral solitary actinic porokeratosis in an 18-year-old male.