Background: It is important to understand knowledge about diagnostic error, such as cognitive bias and heuristics, for preventing a diagnostic error. However, it is unclear whether Japanese residents learn this knowledge. We aimed to assess diagnostic error knowledge in residents throughout Japan and compare it to the benchmark of the previous US score. In addition, [...]

Case Presentation: A 75-year-old man with diabetes mellitus and recently detected pancreatic “cancer” presented with abdominal pain, vomiting and significant weight loss.  Two weeks prior he presented to another hospital with laboratory values indicating obstructive jaundice and initial concern for pancreatic cancer.  No mass was seen by Computed Tomography (CT) of the abdomen and pelvis.  [...]