- To better understand cancer biology and search for novel diagnostic and therapeutic targets, fresh tissue samples from the primary tumour and from metastases will be stored in RNA-later for RNA-extraction and future analyses. Hereto, samples obtained from biliary, gastric, and pancreatic cancer tissue will be stored. Based on the fact that pancreatic cancer is associated with the worst prognosis, and based on our ongoing research on this disease, gene expression studies in the current project will be focused on pancreatic cancer.