Distribution of 99Tcm-sulphur colloid during granulocyte colony-stimulating factor administration in autologous bone marrow transplantation

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Abstract
The distribution of 99Tcm-sulphur colloid (99Tcm-SC) in 15 patients receiving human recombinant granulocyte colony-stimulating factor (G-CSF) following high-dose combination chemotherapy and autologous bone marrow transplantation (ABMT) for treatment of solid tumours was prospectively determined. 99Tcm-SC imaging was performed before treatment and at the time of leukocyte recovery during G-CSF administration. On the baseline 99Tcm-SC study, lung and bone marrow radiocolloid activity were not detected. The study performed during G-CSF infusion demonstrated lung colloid activity in 12 of 15 patients and bone marrow colloid activity in 11 of 15 patients. The average background corrected region of interest counts significantly increased for lung (P < 0.008), bone marrow (P < 0.0001) and cardiac blood pool (P < 0.05), and significantly decreased for liver (P < 0.0005) during G-CSF compared to the baseline study. No relationship between the distribution of 99Tcm-SC and response to therapy or patient outcome could be established. In conclusion, these data demonstrate a shift of 99Tcm-SC to lung, bone marrow and cardiac blood pool, and away from liver following high-dose combination chemotherapy and ABMT and during G-CSF administration in patients undergoing treatment for solid tumours.

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