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目的：探讨胰腺癌的ＣＴ特征、诊断与鉴别诊断。材料和方法：分析５５例（男３９例，女１６例）胰腺癌患者的临床和ＣＴ表现。年龄最大７８岁，最小２８岁，平均５７．７岁。其中胰头部癌３８例（６９．０９％），体部１２例（２１．８２％），尾部５例（９．０９％）。ＣＴ扫描以１０ｍｍ层厚与间隔，自隔顶扫至钩突下缘，胰腺部则取５ｍｍ层厚与间隔。并作冠状面及矢状面重建。结果：５５例中仅２０例手术切除。平均生存期为５～８月。ＣＴ表现为胰腺局部分叶状肿块（５０／５５）；平扫时与周围胰腺组织呈等密度或略低密度：增强后强化不明显，甚至低于正常胰腺组织；胰周组织浸润（２０／５５）；血管受侵（３７／５５）；远处转移（１７／５５）；继发性囊肿（４／５５）。３８例胰头癌ＣＴ中可见胰体、尾萎缩（３４／３８）；胰管扩张（２４／３８）；梗阻性胆管扩张（肝内胆管＋总阻管扩张１５例；单纯肝内胆管扩张４例）。结论：熟悉胰腺癌的特征性与非特征性表现，多数病例可被确诊，但对临床预后无帮助。
Objective: To investigate the CT features, diagnosis and differential diagnosis of pancreatic cancer. Materials and Methods: Clinical and CT findings were analyzed in 55 patients (39 males and 16 females) with pancreatic cancer. The oldest is 78 years old and the youngest 28 years old, with an average age of 57.7 years old. There were 38 cases (69.09%) of pancreatic cancer, 12 cases of body (21.82%), and 5 cases of tail (9.09%). The CT scan was performed with a 10 mm layer thickness and interval, sweeping from the apical septum to the lower edge of the uncinate process, and the pancreas was taken with 5 mm layer thickness and interval. And for coronal and sagittal reconstruction. Results: Of the 55 patients, only 20 underwent surgical resection. The average survival period is from May to August. CT showed a partial foliaceous mass of the pancreas (50/55); when compared with the surrounding pancreas, the CT scan showed isodensity or slightly lower density: enhancement was not obvious after enhancement, even lower than normal pancreas; peripancreatic tissue infiltration (20/ 55); Vascular invasion (37/55); Distant metastasis (17/55); Secondary cyst (4/55). The pancreatic body and tail atrophy (34/38) were seen in CT of pancreatic head cancer in 38 cases; pancreatic duct dilatation (24/38); obstructive bile duct dilatation (intrahepatic bile duct + total dilator tube dilatation in 15 cases; simple intrahepatic bile duct dilation 4 example). Conclusion: Familiar with the characteristic and non-characteristic performance of pancreatic cancer, most cases can be diagnosed, but it is not helpful for clinical prognosis.