IL7 and neoplasm: Regarding the EIBC patients, there have been no correlations between IL-7 serum level and tumor size, age, and Ki-67 (%) (Spearman’s R = 0.5, P = 0.4; Spearman’s R = 0.5, P = 0.6; and Spearman’s R = 0.3, P = 0.7, respectively) (Table 3).