111In-oxine-labelled white blood cells in the diagnosis and follow-up of Crohn's disease.

Prospectively, 43 patients with Crohn's disease (41 clinically active, 2 clinically inactive) and 7 patients with irritable bowel syndrome were examined by111In-oxine-labelled leukocytes (‘mixed’ leukocyte preparations,n=8; ‘pure’ granulocyte preparations,n=42).