胰腺腺泡细胞癌CT影像学分析

An Analysis of Computed Tomography Features of Pancreatic Acinar Cell Carcinoma

[目的]探讨胰腺腺泡细胞癌特征影像学表现。[方法]回顾性分析6例经病理证实的胰腺腺泡细胞癌患者CT资料。[结果]肿瘤位于胰头2例,体尾部3例,胰尾1例。主要影像学表现:①6例瘤体多为类圆形,边界多清楚,直径约4～16cm,平均直径7cm。②平扫多为囊实性肿块,直径较小(<5cm)者以实性结构为主,随直径增大,囊实性比例增大。③增强扫描瘤内实性结构早期轻度强化,后期呈渐进性强化,强化程度低或稍低于正常胰腺组织。囊性结构各期均无强化。④瘤内钙化1例。⑤2例肝转移,1例显示胰胆管侵犯并扩张,腹膜后淋巴结转移,1例脾静脉内癌栓。[结论]胰腺腺泡细胞癌影像学表现具有一定特征性,多为类圆形、边界清、乏血供肿瘤,内部可见钙化,较大时易出现囊变,常见肝转移。

[Purpose] To investigate the imaging features of pancreatic acinar cell carcinoma.[Methods]CT data of 6 cases with pancreatic acinar cell carcinoma pathologically proven was retrospectively analyzed.[Results] Masses located throughout the pancreas 2 in the head,3 in the body and 1 in the tail.Main image findings were as follows：①Six masses were mainly round like with clear edge,the diameter ranged 4-16cm,7cm on average.②All masses were solid and cystic mixture.The smaller ones（5cm） appeared mainly solid.The bigger one showed cystic areas,increasing with the diameter.③On enhanced scans,solid areas showed slight enhancement in the arterial phase,then marked with the time,still less than or near to the sorrowing normal pancreatic parenchyma.④One case showed calcification.⑤Two cases showed liver metastasis,1 case invaded splenic vein,1 case showed bile and pancreatic dilatation,retroperitoneal lymphanode metastasis.[Conclusions] CT image of pancreatic acinar cell carcinoma has distinctive features.It usually presents as round like with clear edge,and hypovascular mass,of which cystic areas increase when it reaches large size,with calcification occasionally,and liver metastasis was commonly find.