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(a) Axial T2 weighted MRI shows a lesion with high T2 signal in the pancreatic head (arrow). The lesion remained isointense to the rest of the pancreatic parenchyma on all phases following contrast administration. (b) Axial post-gadolinium image in the portal venous phase shows no definite lesion. The arrow in (b) points to the expected location of the tumour. Surgical pathology revealed a moderately differentiated neuroendocrine tumour.
