IL7 and neoplasm: Significantly higher levels of IL-7 were found in mice injected with A549 cells close to the bone implant compared to mice injected with A549 cells in the opposite flank (0.57 ± 0.01 and 0.25 ± 0.03 pg/ml, respectively; p < 0.001), while no significant difference was found between opposite flank and control group without tumor cells.