Figure 1.

Two examples demonstrating the exophytic and backward growth morphology of pancreatic lesions. (A) Contrast-enhanced CT image, red arrow, and hypovascular lesion and (B) gray-scale ultrasound image, measurement markers, and hypoechoic lesion illustrate the exophytic and backward growth morphology of a pancreatic lesion located in the neck of the pancreas. (C) Gray-scale ultrasound image, red arrow, and hypoechoic lesion and (D) contrast-enhanced ultrasound image, red arrow, and hyperenhanced lesion display a lesion in the pancreatic uncinate process, which exhibits an exophytic and backward growth morphology.