The main pathological features of this disease are a vasculitis affecting all cutaneous vessels. There are by five characteristic features: * colonisation of endothelial cells by acid-fast bacilli * endothelial proliferation and marked thickening of vessel walls to the point of obliteration * angiogenesis * vascular ectasia * thrombosis of the superficial and mid-dermal blood vessels The likely pathogenesis is endothelial cell injury due to colonization/invasion followed by proliferation, angiogensis, thrombosis and vessel ectasia.
Diffuse leprosy of Lucio and Latapí
Tuberculoid leprosy
Poikiloderma of Civatte
Papuloerythroderma of Ofuji
Lepromatous leprosy
Photoleukomelanodermatitis of Kobori
Melanie's Marvelous Measles
Pityriasis lichenoides et varioliformis acuta