Follicular plugging: A new dermoscopic feature in porokeratosis

Porokeratosis is a keratinization disorder characterized by keratotic papule or plaque, which can have an annular appearance due to its thread-like elevated border which expands centrifugally. It has various clinical variants like disseminated superficial porokeratosis, porokeratosis of mibelli, linear porokeratosis, punctate porokeratosis and porokeratosis palmaris et plantaris et diseseminata, amongst few others. Cornoid lamella is the most peculiar feature of porokeratosis on histopathology. It is the thin column of tightly packed parakeratotic cells extending from an invagination in the epidermis. Well established dermoscopy features of porokeratosis include white track structure (corresponding to cornoid lamella), red dots and globules, pink white scar like areas and white homogenous areas in centre. We hereby report 2 cases of porokeratosis in whom we observed a new dermoscopic feature- follicular plugging. This could be due to follicular involvement, which is an uncommonly discussed entity of porokeratosis.