目的提高对胰腺囊腺癌CT表现的认识,评价CT的诊断价值。方法回顾性分析4例经手术或活检病理证实的胰腺囊腺癌的CT表现,CT检查包括平扫和增强扫描。结果CT平扫4例均呈囊性低密度肿物,囊壁较清楚。病变位于胰头部1例,胰体、尾部3例,最大病灶为5.6cm×6.8cm位于胰头,最小者为3.0cm×3.1cm在胰体部,病灶呈圆形1例,类圆形2例及分叶形1例。CT值1.1HU～28.2HU。2例囊内见线状分隔,2例囊壁厚薄不均并见壁结节。1例囊壁弧形钙化伴囊内结节状钙化。增强后囊壁、壁结节及囊内间隔不同程度强化。1例胰头病变推压十二指肠及下腔静脉,1例肝内见囊性转移状。结论CT检查能全面地显示胰腺囊腺癌的特征性图像和血管侵犯及远处转移的情况,为正确诊断与合理治疗提供了可靠的影像学依据。 Objective To improve the understanding of CT manifestations of pancreatic cystadenocarcinoma and evaluate the diagnostic value of CT. Methods CT findings of 4 cases of pancreatic cystadenocarcinoma confirmed by surgery or biopsy were retrospectively analyzed. CT examination included plain and enhanced scans. Results CT scans showed cystic low-density tumors in all 4 cases. The cyst wall was clear. The lesions were located in the pancreatic head in 1 case, pancreatic body and tail in 3 cases. The largest lesion was 5.6cm x 6.8cm in the pancreatic head, the smallest was 3.0cm x 3.1cm in the pancreatic body, and the lesion was round in 1 case. 2 cases and lobulated 1 case. The CT value is 1.1HU to 28.2HU. Two cases showed linear separation within the capsule, and two cases showed uneven wall thickness and metnodus. One case had arcular calcification with nodular calcification in the capsule. Enhancement of the posterior wall, wall nodule, and intracapsular space were enhanced at different levels. One case of pancreatic head lesions pushed the duodenum and inferior vena cava, and one case showed cystic metastases in the liver. Conclusion The CT scan can fully display the characteristic images of cystic adenocarcinoma of the pancreas and the condition of vascular invasion and distant metastasis. It provides a reliable imaging basis for correct diagnosis and reasonable treatment.