The MRI also confirms the presence of diffuse dilatation of the main pancreatic duct, and identifies dilatation of some of the side branches. There is a continuous column of T2 hyperintense signal throughout the duct and extending into the ampulla, this is the fish mouth ampulla sign. There is no nodularity within the pancreatic duct. No abnormal restriction of diffusion is identified. Inflammatory lymph nodes are present adjacent to the pancreas. There is some oedema of the head and neck of the gland.