UKMLA PLAB AMC USMLE Prometric MCQ

a) transhepatic portal venous sampling is useful in distinguishing between tumours located in the duodenal wall and tumours located in the head of the pancreas
b) arterial stimulation venous sampling is usually from the heaptic veins
c) on arteriography tumours typically appear as a late venous blush
d) on MR glucagon is useful to reduce motion artefact
e) on unenhanced CT islet cell tumours typically appear as low attenuation lesions