Figure 4. A 41-year-old man with an insulinoma in the body of the pancreas. This lesion shows the uncommon low signal intensity pattern on the T2 weighted fast spin echo image. (a) T1 weighted spin echo image (TR/TE 400/14 ms). The tumour (arrow) appears as a low signal bulge in the contour of the pancreas. (b) T2 weighted fast spin echo image (TR/TE 4000/105 ms) shows the tumour (curved black arrow) is of low signal intensity, isointense to the pancreatic parenchyma. (c) Fat saturated T1 weighted image (TR/TE 400/14 ms) shows the tumour (curved white arrow) as low signal in the surrounding high signal pancreatic parenchyma. (d) Contrast enhanced fat saturated T1 weighted image (TR/TE 400/14 ms) shows that the tumour (white arrow) has become isointense to the pancreas. (e) Contrast enhanced CT shows the tumour only as a bulge (white arrow) in the pancreatic contour.
