Porokeratosis is a rare specific disorder of keratinization with distinct clinical and histopathological features with rare malignant degeneration. Clinically. it is characterized by papular lesions or annular plaques with central atrophy and peripheral keratotic ridge and histologically with the presence of cornoid lamellae. It mainly presents on the extremities. https://www.roneverhart.com/Pedaltrain-Classic-1-w-Soft-case/