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[99mTc tin colloid scintigraphy in the diagnosis of acute rejection reactions in kidney transplants].

Quantitative measurements of 99MTc-tin colloid uptake in renal transplants permits differentiation of acute rejection from other causes of deteriorating renal function, such as acute tubular necrosis, cyclosporin A nephrotoxicity or chronic rejection. 144 99mTc-tin colloid scintigrams were performed on 71 renal transplants; the results were compared with clinical, biochemical and histological findings. Sensitivity of colloid scintigraphy is 97.4% and specificity is 80%. Compared with other isotope methods, this has the advantage that it does not depend on comparison with repeated examinations.