Additionally, the serum concentration of CCL18 is higher in cancer patients than in healthy individuals, especialy in cases of T-cell acute lymphoblastic leukemia [6], breast cancer [172,173], cutaneous T-cell lymphoma [148], laryngeal squamous cell carcinoma [174], non-small cell lung cancer [175,176], ovarian cancer [177], pancreatic ductal adenocarcinoma [59], and prostate cancer [178]. This evidence concerns the gene CCL18 and pancreatic ductal adenocarcinoma.