摘要
目的 了解非功能性胰内分泌肿瘤的螺旋CT双期增强扫描的表现。方法 回顾性分析 1 8例经手术病理证实的非功能性胰内分泌肿瘤的螺旋CT表现。螺旋CT采用平扫和双期 (动脉和门静脉 )增强扫描 ,层厚 1 0mm、螺距 1 0 ,非离子型碘对比剂总量 90ml,注射流率 3ml/s,动脉、门脉期扫描分别为 30s和 70s。结果 1 8例肿瘤平均大小 5 3cm× 5 9cm× 6 2cm ,其中位于胰头9例、胰颈 4例、胰体尾 3例和胰尾 2例。平扫呈稍低密度 7例、低密度 3例、水样密度 2例和等密度6例 ,其中 4例可见肿瘤内有钙化。增强扫描动脉期肿瘤呈中等至明显强化 1 3例 ,其中均匀和不均匀强化各占 5例、环状强化为 3例。 9例胰头肿瘤中 ,1例胆管轻度扩张、3例胰腺管轻度扩张和 1例胰体尾轻度萎缩。本组病例中 5例胰腺周围血管受累。结论 非功能性胰内分泌肿瘤螺旋CT动脉期扫描呈中等或明显强化为其特征 ,同时具有较少侵犯胰腺管和 (或 )
Objective To understand the CT features of nonfunctioning endocrine tumors (NFETs) of the pancreas by enhanced dual phase spiral CT. Methods Eighteen surgically and pathologically confirmed NFETs of the pancreas were studied with retrospective analysis. The spiral CT findings were investigated by using pre contrast and contrast scanning (including arterial and portal venous phase) with 10 mm thickness and 1.0 pitch. The contrast enhanced study started in 30 s and 70 s after initiation of injection of the contrast medium with a volume of 90 ml at the rate of 3 ml/s. Results The average size of the tumor was 5.3 cm×5.9 cm× 6.2 cm. The tumor localized in the pancreatic head in 9 cases, in the pancreatic neck in 4, in the pancreatic body tail junction in 3, and in the pancreatic tail in 2. On pre contrast imaging, the tumors showed mild hypodensity in 7 cases, hypodensity in 3, cystic density in 2, and isodensity in 6, respectively. Among all the lesions 4 tumors exhibited calcification. Moderate to marked enhancement of the lesion accounted for 72.2% (13/18). There were 5 tumors with homogenous enhancement, 5 tumors with heterogenous enhancement, and 3 tumors with ring enhancement on the arterial phase scanning. Meanwhile, of the 9 cases with pancreatic head tumor, there was only one case with mild dilation of the common bile duct, and mild dilated pancreatic duct was seen in 3 cases and mild atrophy of the pancreas in 1 case. Peripancreatic vessels were invaded in 5 cases. Conclusion NFETs of the pancreas presented with moderate to marked enhancement during arterial phase scanning in this study. Meanwhile, the tumor was less likely to invade the common bile duct, pancreatic duct, and peripancreatic vessels as well.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
2003年第6期528-531,共4页
Chinese Journal of Radiology
