Abstract
A 63-year-old female was admitted to our hospital for the evaluation of diabetesmellitus. LTS showed a cystic lesion with several small nodules in the pancreatic body andCT demonstrated a faintly enhanced lesion of the pancreatic body. ERCP revealed adiffuse dilatation of main pancreatic duct(MPD)and a filling defect lesion in the inferiorside of MPD in the pancreatic body. EUS revealed a high-echoic mass in MPD adjacentto cystic lesion of the pancreatic body. POPS showed a polypoid lesion growing to alrnostobstruct its lumen of the pancreatic body. Most of the surface of the polyp was smooth withred spots. IDUS of thepolypoid lesion revealed a homogeneous, high-echoic lesio in thepancreatic body. Distal pancreatectomy and splenectomy were carried out. Histologically, the polypoid tumor was composed of a markedly proliferating tu.bular adenoma with lowgrade atypia. It was generally krlown that intraductal neoplasms of the pancreas wascommonly composed of papillary structure. Therefore this appeared to be a rare case, which had an intraductal tubular adenoma proliferating like a Y-III polyp.
