CXCR2 and ovarian serous adenocarcinoma: The clinical‐pathological characteristics of the case (age, tumour grade, distant metastasis and stage) and their relationship with the expression of IL‐8, CXCR1 and CXCR2 were reported in Table 1, and the high expression of IL‐8 and its receptors in high‐stage serous ovarian cancer were shown in Figure 1A. We found that the high expression of IL‐8 and CXCR2 were closely correlated with high tumour grade, tumour distant metastasis and high tumour stage, and the high expression of CXCR1 was closely related to high tumour grade and tumour distant metastasis.