Cutaneous Leishmaniasis
摘要
Cutaneous leishmaniasis (CL) is a disease caused by protozoan parasites of Leishmania spp. that are transmitted by phlebotomine sand fly bites, commonly at nighttime. Infected dogs represent parasite reservoirs. CL usually involves the exposed areas and typically presents as an indolent nodule or plaque characterized by a central ulcer/erosion and crust, with underlying keratin plugs. Dermatoscopy can be useful for a noninvasive diagnosis by showing diffuse erythema that can range from dusky red, light red, to yellowish red, associated with yellowish-orange structureless areas. In initial CL, yellow tear-like structures, milium pseudocysts, and polymorphous vessels arranged in a radial pattern are generally detected. Advanced lesions commonly display hyperkeratosis and white peripheral projections resembling a milky starburst-like pattern around a central ulcer/erosion or crust.