The present invention relates to miRNA biomarkers for use in the diagnosis of pancreatic diseases, in particular pancreatic cancers and pre-cancerous diseases, such as pancreatic ductal adenocarcinoma (PDAC), in particular the early detection of PDAC. The miRNA biomarkers are miR-143, miR-223, miR-204, miR-30e, miR-26a, miR-30a, miR-30b and miR-106b. They may be combined with protein biomarkers. The present invention also provides methods of diagnosis and treatment of PDAC and related diseases, and kits for the early detection of PDAC based on the expression levels of the biomarkers in biological samples, in particular urine samples.