CCL20 and neoplasm: Moreover, the median CCL20 gene expression in normal tissue was 917 (Q1: 487, Q3: 1898) compared to 3339.5 (Q1: 1448, Q3: 7536) in tumour tissue and 1460 (Q1: 691, Q3: 3620.5) in metastatic tissue (p = 2.4 × 10−58, Kruskal–Wallis test; Figure 5B).