On the other hand, there were also no significant differences in the percentage of CD4+IL-6+ T cells among all groups prior to surgery (39.2 ± 28.9% in gastric resection, 32.1 ± 23.3% in colorectal resection, 40.0 ± 24.9% in hepatic resection and 30.3 ± 37.0% in LC), showing no significant differences among all groups after surgery. This evidence concerns the gene IL6 and laryngotracheoesophageal cleft.