Tumour metastasis in livers and mesenteries were suppressed in TP73‐AS1 low expression groups (Panc‐1 si‐group 1/3 metastases in liver and 1/3 metastases in Mesentery, Miacapa‐2 si‐group 0/3 metastases in liver and 0/3 metastases in Mesentery) compared to the control group (Panc‐1 nc group 3/3 metastases in liver and 3/3 metastases in Mesentery, Miacapa‐2 nc group 3/3 metastases in liver and 3/3 metastases in Mesentery ). This evidence concerns the gene PTGDR and neoplasm.