Esophageal cancer cells attract hUCMSCs in vitro. The migratory ability of hUCMSCs was analyzed by transwell assay. A significantly greater number of hUCMSCs migrated toward the culture of esophageal cancer cells (Eca109 or TE-1) than toward the medium without esophageal cancer cells. The number of cells was counted in five fields per Transwell membrane. Each group consisted of three duplicates. (*p < 0.05 versus control).