A special kind of body scan using a tagged molecule might help doctors find tiny tumors in the pancreas that cause low blood sugar — all without surgery.

Some tumors have a special marker that might let doctors see them better on scans or treat them with targeted radiation, because the marker shows up strongly on the tumor but not in healthy tissue around it.

A special kind of body scan using a radioactive tag might help scientists see how insulin-making cells change in people with diabetes or obesity, which could help in developing new treatments.