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Scintigraphy with In-111-Labeled Red Cells in Intermittent Gastrointestinal Bleeding

Cliniques Universitaires St-Luc, University of Louvain, Brussels, Belgium

Correspondence: For reprints contact: A. Ferrant, Depts. of Haematology and Nuclear Medicine, Cliniques Universitaires St-Luc, 10 Avenue Hippocrate, 1200 Bruxelles, Belgium.

ABSTRACT

The site of active intermittent gastrointestinal (GI) bleeding could not be found in a patient until abdominal scintigrams with indium-111-labeled red cells suggested that the bleeding was in the ascending colon. Right hemicolectomy abolished the hemorrhages. The binding of In-111 to the red cell is such that vascular activity could be clearly seen over a 5-day period. Indium-111-labeled red cells might provide an excellent tracer to locate intermittent active GI bleeding.