The patient is a 19-year-old male with a history of systemic lupus erythematosus and chronic intestinal pseudo-obstruction presented with acute lower gastrointestinal bleed with bright red blood per rectum who has had a negative colonoscopy. The patient is referred for evaluation of active GI bleeding..

Normal tracer activity is seen in the blood pool of the abdominal aorta, common iliac arteries, femoral arteries, liver, spleen and genitalia on all of the interval images. No evidence for abnormal tracer uptake is noted ectopic to the blood pool that would be consistent with an active GI bleed.

There is no evidence for an active gastrointestinal bleed during the initial 1 hr observation period.