Your doctor has run out of ideas for a diagnosis. He’s trying to take treatments off the table, ordered one last test, a long shot, so he can list possibilities he doesn’t have to pursue.

The sonographer does some deep sea diving, your body a submarine emitting silent communications. Clicks record every surface to show the structure and movement of the liver, gallbladder, pancreas, kidneys, bile ducts, and aorta, the fixtures of your ife.

The good news would be that the plunge finds nothing. We still wouldn’t know what causes your symptoms. Discovering some abdominal mystery would be another kind of news. A diagnosis could then inform treatment. We await the results.