UNEXPECTED PULMONARY CLUMPING OF IN-111 LEUKOCYTES ATTRIBUTABLE TO INDIUM OXINE REAGENT

Five cases of artifactual In-111 leukocyte pulmonary activity were not ed at three local hospitals in a 4-day period. Based on the difference s in the preparation of the final indium leukocyte product, the proble m could be attributed to the indium oxine reagent in a specific lot. T his artifact of multiple small foci of marked increased activity in th e lungs (clumping pattern), attributable to the In-111 oxine reagent, has not been described previously.