Localised nasal actinic porokeratosis: An independent subtype of porokeratosis?

Porokeratosis (PK) are a group of keratinizing disorders clinically characterized by atrophic plaques with peripheral hyperkeratotic ridge which gradually spread in a centrifugal manner. The sites of predilection are trunk or extremities and facial lesions are rarely reported. We report a sporadic adult-onset case of porokeratosis of a 20 year old female with a solitary, asymptomatic, persistent classical plaque confined to the ala of nose. On reviewing the literature, nasal and perinasal area has been found to be exclusively involved in many cases of facial porokeratosis. Such cases have unique yet common epidemiological and clinical profile thereby deserving a separate category while being classified