“…Peptic ulcer disease, cholecystitis, diverticulitis, and carcinoma of the pancreas, stomach, or intestine can have similar presentations. Therefore, preliminary investigations are often appropriate; however, the time until the diagnosis is made and an angiogram is obtained can be very long in some cases, with a mean interval until diagnosis of over a year in one review (91,93,94) . Duplex scanning can be used as a screening tool, and to document noninvasively the presence of stenoses or occlusions of the visceral vessels (95 -100) .…”