Can you identify a cause for the rectal bleeding?
Actively bleeding Meckel's diverticulum in the right iliac fossa.
The unenhanced acquisition shows a blind-ending tubular structure in the right iliac fossa (Meckel's diverticulum). Note the absence of any hyperdense material in the diverticulum lumen.
The arterial post-contrast acquisition demonstrates early filling of the diverticulum with hypedense material (blood).
On the delayed post-contrast acquisition, the blood can be seen to have further filled the lumen of the diverticulum with some extension into the adjacent ileal loop.