摘要
目的 :探讨无功能胰岛细胞瘤的CT表现。方法 :回顾性分析 9例经手术和病理证实的无功能胰岛细胞瘤的CT表现。 9例均行电子束CT动静脉双期扫描 ,1例行多幅流动扫描。测量胰腺和肿瘤动静脉双期的CT值。结果 :9例无功能胰岛细胞瘤中 5例位于胰头 ,3例位于胰尾 ,1例位于胰颈。 8例肿瘤有程度不同的强化 ,1例因囊变和出血无强化。4例肿瘤动脉强化程度高于静脉期 ,3例与静脉期相同 ,1例低于静脉期。与胰腺实质比较 ,3例为高密度肿块 ,2例为等密度 ,4例为低密度。 2例肿瘤内可见局限性钙化 ,4例伴胰管扩张。 1例出现肝脏内多发性低密度转移灶。结论 :无功能胰岛细胞瘤多表现为边界清晰的较大的肿块 ,多数肿瘤有程度不同的强化 ,瘤内多有坏死、囊变、出血和钙化。
Objective:To evaluate the CT findings of nonfunctioning islet cell tumor(NF1T)of the pancreas.Methods:Nine patients with pathological proven NF1T were evaluated by arterial and venous dual-phase electronic beam computed tomography(EBCT).Scan delay was 30s for the arterial phase and 60s for the venous phase.Tumor size,location,enhancement pattern,presence or absence of pancreatic and biliary duct dilation,liver metastases and so on were evaluated.CT attenuation of the tumor and normal parenchyma was measured in both arterial and venous phases.Results:Five tumors were located in pancreatic head and 3 in the tail and 1 in the neck.Eight of 9 cases showed enhancement in different degree and one no ehancement because of cyst and hemorrhage.The enhancement values of 4 tumors were greater in the arterial phase than in the venous phase,and of 1 tumor less,and of 3 tumors equal in two phases.Three lesions showed hyperdense masses,and 2 isodense,and 4 hypodenese relative to pancreatic parenchyma.Two NF1Ts contained focal calcification and four cases had pancreatic duct dilatation.One patient had hypovascular liver metastases.Conclusion:NF1Ts are usually larger and show nonuniform enhancement,with a well-defined marging,occasional calcifications,and low-attenuation representing areas of necrosis and/or cyst within the tumor iteslf.
出处
《医学影像学杂志》
2001年第6期356-358,共3页
Journal of Medical Imaging
