MSCT features of intraductal papillary mucinons tumors of the pancreas

Abstract

Objective To investigate MSCT features of the intraductal papillary mucinous tumor of the pancreas. Methods The CT findings of 40 cases of intraductal papillary mucinous tumors confirmed by pathology were retrospectively analyzed, and the location, size, shape, edge and enhancement of the tumor were observed. Results Malignant (n=8) : all of them were mainly pancreatic duct type, including 6 cases in the head of pancreas and 2 cases in the tail. All of them were multi-room, with 7 cases of cystic wall nodules and 7 cases of uneven septum thickening. The diameter of tumor cystic lesion was (41.0±0.5) mm on average, and the widest diameter of the dilated pancreatic duct was (6.9±1.0) mm. The cystic wall, wall nodule and interval were mild and moderate enhancement in the arterial phase, and continuous strengthening in the portal and delayed phases. Borderline (n=15) : 8 cases of main pancreatic duct type, 1 case of branch pancreatic duct type, and 6 cases of mixed type. There were 10 cases in the head of the pancreas and 5 in the tail of the pancreas. There were 10 cases of multi room in the lesion, and the CT findings were composed of multiple clusters of small cystic lesions, with 3 cases of tuberous nodules on the cyst wall and 4 cases of irregular thickening of the cysts. 5 cases were single room type, with capsule wall smooth and whole. The diameter of tumor cystic lesion was (28.0±0.5) mm on average, and the maximum diameter of the dilated pancreatic duct was (5.2±0.3) mm. The cystic wall and interval were mild and moderate enhancement in the arterial phase, and mild and continuous strengthening in the portal and delayed phases. Benign (n=17) : 1 case of main pancreatic duct type, 10 cases of pancreatic duct type and 6 cases of mixed type; There were 12 cases in the head of the pancreas and 5 in the tail. All of them were single cystic type, and the cyst wall was smooth. The diameter of the tumor cystic lesion was (26±0.3) mm on average and the maximum diameter of the dilated pancreatic duct was (3.5±0.4) mm. There was no enhancement of the cystic wall in the arterial phase, mild enhancement in the portal phase, and mild continuous delayed phase in 2 cases, no enhancement in 15 cases. Conclusion MSCT expression of the intraductal papillary mucinous tumor of the pancreas has its characteristic features, which is helpful for the diagnosis and treatment of the disease. Key words: Pancreatic neoplasm; Intraductal papillary mucinous neoplasms; Tomography; X-ray computer