Abstract
Ultrasound findings of pancreatic cancer focus on the following three; (1) dilatation of the main pancreatic duct with or without dilatation of the common bile duct, (2) hypoechoic mass lesion, (3) swollen pancreas, associated with pseudotumor findings. In this paper, concerning ultrasound of the pancreas, tips and pitfalls were revealed, findings of pancreatic cancer were shown, Pseudotumor findings were displayed, and principles of differential diagnosis among cancer, benign tumor, and Pseudotumor were discussed with presentation of demonstrable cases.