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In-111-Labeled Leukocyte Imaging: False-Positive Study Due to Acute Gastrointestinal Bleeding

University of Washington, Harborview Medical Center, Seattle, Washington

Correspondence: For reprints contact: Thomas G. Rudd, MD, Dept. of Radiology ZA-65, Harborview Medical Center, 325 9th Ave., Seattle, WA 98104.

ABSTRACT

A case is reported in which In-111-labeled leukocytes accumulated in the left colon on a 24-hr delayed image. This was found to be secondary to an upper gastrointestinal bleed in progress at the time of injection of the radiolabeled leukocytes.