Further, exogenous rIGF‐2 was able to restore migration in IGF‐2R‐RNAi‐transfected MSCs, but not in IGF‐1R‐RNAi‐transfected cells, demonstrating that IGF‐1R is probably more important for MSC tumor tropism than IGF‐2R. The gene discussed is IGF2R; the disease is neoplasm.