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Gallbladder Visualization During Technetium-99m-Labeled Red Cell Scintigraphy for Gastrointestinal Bleeding

Section of Nuclear Medicine, Geisinger Medical Center, Danville, Pennsylvania

Correspondence: For reprints contact: David R. Brill, MD, Section of Nuclear Medicine, Geisinger Medical Center, Danville, PA 17822.

ABSTRACT

Localization of radionuclide activity in the gallbladder was seen on delayed views following injection of ^99mTc-labeled red blood cells for gastrointestinal bleeding in five patients. The mechanism for this unusual finding probably relates to labeling of heme, the biochemical precursor of billrubin. All patients had had prior transfusions. All but one had servere renal impairment, probably an important predisposing factor.