No statistically significant difference was found between the percentages of positive samples for each cytokine and the different groups analyzed (patients/controls, stage, number, location and size of the cyst, serology, and sex of patients), with the exception of the association of IL-4 and IL-13 with the cyst stage (P = 0.010 and P = 0.033, resp). The gene discussed is IL13; the disease is cyst.