Objective To investigate the diagnostic value of routine magnetic resonance imaging and MRCP for intraductal papillary mucinous tumor of pancreas (IPMNs). Methods Retrospectively analyzed the clinical data of 9 patients with IPMNs proved by surgery and pathology including routing magnetic resonance imaging and MRCP. Re-sults The study demonstrated that there were 3 cases of main duct type, MRI showed that the major performance were diffuse expansion of main pancreatic duct or segmental expansion, presented long T 1 low-signal,and long T2 high-signals,with or without intramural nodule which had mild or moderate enhancement. Four cases were branch duct type, located in uncinate process and head of pancreas. MRI showed multiple or single cystic lesion of clusters, pre-sented long T1 low-signal, and long T2 high-signals with short T2 low-signal septation. Two cases of mixed type, both the main pancreatic ducts and branch ducts have different levels of dilation. MRCP demonstrated clearly that the main pancreatic duct communicate with cystic tumor. Conclusion It may be effective to combine routine magnetic reso-nance imaging and MRCP in the diagnosis of IPMNs.%目的：探讨胰腺导管内乳头状黏液性肿瘤（IPMNs）的常规磁共振成像（MRI）和磁共振胰胆管造影（MRCP）表现。方法回顾性分析9例经手术病理证实的IPMNs患者的常规MRI和MRCP表现。结果主胰管型3例，表现为主胰管弥漫性或节段性扩张，呈长T1低信号长T2高信号，伴或不伴附壁结节，附壁结节呈轻中度强化；分支胰管型4例，病灶均位于胰头钩突处，表现为单发囊性病变或葡萄状多发囊性病变，呈长T1低信号长T2高信号，伴腔内分隔，分隔为短T2信号；混合型2例，表现主胰管和分支胰管均有不同程度扩张。 MRCP均可清晰显示扩张的管道及其交通。结论常规MRI联合MRCP对诊断胰腺IPMNs具有较高临床价值。
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