Fig. 6From: The application of prenatal ultrasound in the diagnosis of congenital duodenal obstructiona The bifurcation of the head of pancreas is characterized by ‘pliers’ sign. The head of pancreas is hypertrophic and irregular; b. A patient of misdiagnosed duodenal dilatation with ‘rat tail’ sign. The shape of pancreas is regular. The angle between pancreas and duodenum is obtuse. Duodenum (D); Stomach (ST); Pylorus(P)Back to article page