Unilateral systematized linear porokeratosis: a report of a rare case

Histology of skin biopsy specimen from the foot and thigh revealed similar features of basketweave hyperkeratosis with a cornoid lamella located adjacent to an acrosyringium with perivascular mononuclear infiltrate in the dermis [Figure 3]. {Figure 1}{Figure 2}{Figure 3} Porokeratosis is a disorder of keratinocyte growth and differentiation that presents as sharply demarcated scaly papules with a distinctive hyperkeratotic ridge containing thread-like grooves.