Tumours of the head, body and tail of the pancreas gl Unfortunately, we did not have the ability to perform positron emission tomography (PET), and therefore we performed ASVS to confirm the organic hyperinsulinism and to localise the hormone-active tumour. The role of calcium-stimulated venous sampling in the surgical treatment of multiple neuroendocrine neoplasms. In our case, four tumours had been revealed in different parts of the pancreas (body, tail, head and uncinate process) by preoperative contrasted CT and MRI. [Extracted from the article]