Tumor. A tumor may well hold bile from draining out of the gallbladder as it ought to. This causes bile buildup that may lead to cholecystitis. Veins carry blood back to the heart following the oxygen is eradicated. Once the vein is blocked, blood backs up while in the intestines, https://www.sgvascularctr.com/treatments-for-gangrene-insights-from-a-vascular-surgeon/