Is ectopic pancreatic tissue a rare finding?
In histological work ups it's not that rare, there are reports from 1 - 14 % of ectopic pancreatic tissue in autopsy cases.
Is there any clinical significane?
Usually not. It is really rare for ectopic pancreatic tissue to cause symptoms or require treatment.
There is a loss of haustral markings (lead pipe sign), the patient has a known chronic ulcerative colitis.
But as in the MRI scan above, the mass in the fat tissue adjacent to the ascending part of the duodenum looks exactly the same as the normal pancreatic tissue. The finding is therefore still consistent with ectopic pancreatic tissue.