Consistently, BLI showed that ectopic expression of LIFR‐K620Q in tumour cells resulted in the preferential metastasis to the bone 4 weeks after injection, whereas the control cells and cells expressing the other two mutant LIFR proteins (K620R and K620Q‐S1044A) displayed significantly fewer luminescent signals (Figure 6F, top). This evidence concerns the gene LIFR and neoplasm.