Fig. 5. Leukocytes do not increase MADB106 lung tumor retention, whereas leukodepleted erythrocytes (leukodepleted packed cells) do increase it. Percentage of lung tumor retention (mean ± SEM) in rats transfused with: ( A ) Packed cells, but not leukocytes, significantly increased tumor retention. n = 24; 6–9 per group. ( B ) Both packed cells and leukodepleted packed cells (only erythrocytes) significantly increased tumor retention. n = 21; 6–8 per group. * Significant pairwise difference from the respective saline control group (protected least significant difference, P < 0.05).