[Necrotic angiodermatitis]

Necrotic angiodermatitis, as defined and described by the School of Lyon and especially by D. Colomb, stays at the confines of dermatology and angiology. Its diagnosis is easy in front of such "cutaneous gangrene in superficial plates". In fact it is a microangiohistopathy, it appears like an infarction of the skin, due to atherosclerosis and so to senescence, it means a low flow of perfusion and perhaps relates to immunology.