Wirsungocele is defined as a cystic dilatation of the terminal portion of the main pancreatic duct, and this is an extremely rare malady. The pathophysiology of Wirsungocele has been proposed that a congenital or acquired weakness in the distal duct that's associated with functional obstruction may lead to the formation of Wirsungocele. In addition, mechanical obstruction of the distal duct has been considered as another mechanism of Wirsungocele. We report here on the imaging findings of two cases of Wirsungocele that seemed to occur by different pathophysiologic mechanisms.