Linear porokeratosis of the foot with dermoscopic manifestations: A case report

Figure 1 The centre of the plaque was slightly atrophic and depressed. A: Left plantar skin lesions in patient with perspiration keratosis; B: There were scattered ring-shaped light-brown keratinizing papules at the bottom of the left foot, about 0.3-0.5 cm in diameter, partially fused, diffuse and banded, distributed along the B line; C: The surface was rough, the boundary was clear, and the skin in the center of the lesions was slightly sunken and atrophic.

Figure 2 Dermoscopic manifestations of plantar skin lesions in porokeratosis. A: The foot base is scattered in black brown ring structure, the edge of the dike; B: Irregular pale white hypopigmented areas were seen in the center of the skin lesions.

Figure 3 Pathological images of skin lesions of porokeratosis. A: HE staining, ×100, B: HE staining, ×200, C: HE staining, ×400. Epidermis was hyperkeratosis with a high degree of hyperkeratosis, with columns of parakeratosis, thinning of the granular layer, thickening of the spinous layer, and a small amount of lymphocyte infiltration in the superficial dermis.