"Mononeuritis multiplex mainly has a vasculitic pathogenesis. There is occlusion of epineurial arterioles in vasa nervorum resulting in fibrinoid necrosis with neutrophilic and lymphocytic infiltrate. This also results in axonal degeneration 5."
"The nerves most commonly affected are sural nerve and peroneal nerve in the lower limb and ulnar, median and radial nerves in the lower limb 5."