Skin necrosis is a consequence of local devascu-larisation, induced by multiple causal factors like infection, macroangiopathy or microangi-opathy, hyperpressure coming from outside or inside, or high-velocity trauma (Figs. 1.1, 1.2, 1.3, 1.4, 1.5, and 1.6). Necrosis is a consequence of cascades of events starting on the venous side and then blocking the arterioles …