| Objective To explore MR feature of cystic lesions of the pancreas. Methods Thirty-one patients(33 lesions) with pathologically proven cystic lesions of the pancreas were performed with conventional MR imaging, MRCP and mutiphasic contrast enhancement. The data of clinic and imaging appearance were retrospectively analyzed. Results Among 31 patients, there was only one case with congenital cyst, which was low intensity on T1WI and high intensity on T2WI with thin and smooth cyst wall. Two cases were retention cysts which connected to the pancreatic duct, and mucinous cystadenocarcinoma of head of pancreas was accompanied in one case. Two cases were pancreatic pseudocysts, which showed homogeneous long T1 and long T2 signal intensity with smooth wall; four cases were walled off necrosis, the wall of which was irregular with heterogeneous signal intensity in it; all six patients had history of pancreatitis. Five caseshad serous cystic neoplasm, whose wall and septa were thin and the signal was the same among cavities, of themthree cases were honeycomb in shape. Five cases were mucinous cystadenoma, and of them two cases had wall nodule, and three cases had homogeneous signal among cavities. Five cases were mucinous cystadenocarcinoma, all of which had wall nodule and the signal of cavities was heterogeneous. Four cases were intraductal papillary mucinous neoplasm, which appeared as botryoidal cystic lesionsconnected to the main pancreatic duct. Five cases showed solid pseudopapillary neoplasm, of which two cases were cystic and three cases were cystic and solid, with progressive enhancement in solid components. Conclusion MRI is valuable for the diagnosis and differentiated diagnosis of cystic pancreatic diseases. |
