Fig 1.

Pre- and postoperative serum levels of interleukin (IL)-6. The relationship between polymorphism of the cytokine genes (tumor necrosis factor (TNF)-α -1031 T/C, IL-1β -511C/T, IL-6 -634C/G, IL-10 -819 T/C) and IL-6 level in 120 patients after esophagectomy. Solid circles indicate wild-type polymorphism, open circles indicate variant-type polymorphism. Values are expressed as mean±standard error. Statistically significant according to the Mann-Whitney U test. IL interleukin, TNF tumor necrosis factor, POD postoperative day