Pancreatic cystic lesions have various etiologies,including pseudocyst (inflammatory cyst), retentioncyst, congenital cyst, and neoplastic cyst (1).Recently, we experienced a case with a uniquepancreatic cyst-like lesion causing recurrent acutepancreatitis. This patient had multiple cystic dilatations of branch pancreatic ducts surrounded by proliferationof smooth muscle tissue, with neither neoplastic nor inflammatory changes. To our knowledge, there are no previous reports of such a case.