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目的总结自身免疫性胰腺炎(AIP)的影像学特点。方法回顾性分析13例经手术病理学检查或糖皮质激素治疗证实的AIP患者的临床资料。结果 13例均行CT检查,7例同时行MRI检查、DWI扫描及磁共振胰胆管造影(MRCP)检查,2例同时行超声检查。8例表现为胰腺弥漫性肿大,4例表现为胰腺局限性肿大,1例表现为胰腺混合型肿大。CT动态增强扫描结果提示,胰腺病变呈“雪花状”渐进性强化,T1WI信号减低,T2WI信号略高,DWI信号增高;MRCP检查可见胆总管胰内段呈“鸟嘴样”狭窄;超声检查显示胰腺病变部位肿大,回声减低。结论 AIP具有典型的影像学特征,影像学检查是发现和诊断AIP的重要手段。
Objective To summarize the imaging features of autoimmune pancreatitis (AIP). Methods The clinical data of 13 AIP patients confirmed by pathological examination or glucocorticoid therapy were retrospectively analyzed. Results Thirteen patients underwent CT examination. Seven patients underwent simultaneous MR examination, DWI scan and MRCP. Seven patients underwent simultaneous ultrasound examination. 8 cases showed diffuse enlargement of the pancreas, 4 cases showed limited enlargement of the pancreas, 1 case showed pancreas mixed swollen enlargement. CT dynamic enhanced scan results suggest that pancreatic lesions were “snow-like” progressive enhancement, T1WI signal was reduced, T2WI signal slightly higher, DWI signal increased; MRCP examination of the common bile duct was pancreatic segment was “beak” stenosis Ultrasound showed enlarged pancreatic lesions and decreased echo. Conclusion AIP has typical imaging features. Imaging examination is an important means to discover and diagnose AIP.