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目的:总结CT平扫呈高密度的肾细胞癌的CT特征,分析其病理基础。方法:总结48例肾细胞癌,其中CT平扫呈高密度者17例;按肿瘤大小分三组(直径大于6cm,介于6~3cm,小于3cm),观察各组中高密度肾细胞癌所占比例,分析17例病人病理大体及镜下改变。结果:三组中高密度肾细胞癌分别为小于10%,大于50%和大于50%;病理改变为:细胞类型为混合型,以透明细胞为主者居多,占76.5%(13/17)。肿瘤内出血,细胞数目多且排列紧密,瘤内有炎性细胞浸润者分别为76.5%(13/17),70.6%(12/17),41.2%(7/17)。结论:高密度肾细胞癌体积较小(多小于6cm),平扫CT值较正常肾实质高5~10HU。病理分析显示可能与肿瘤内出血,肿瘤细胞数目多且排列紧密,瘤内炎性细胞浸润有关。
OBJECTIVE: To summarize the CT features of high density renal cell carcinoma on CT scan and analyze the pathological basis. Methods: 48 cases of renal cell carcinoma were summarized, of which 17 cases had high density of CT scan. The tumor size was divided into three groups (diameter> 6 cm, range 6 cm to 3 cm, less than 3 cm). The high density renal cell carcinoma Accounting for 17 cases of pathological changes in patients with gross and microscopic. Results: The medium and high density renal cell carcinomas in three groups were less than 10%, more than 50% and more than 50% respectively. The pathological changes were as follows: the cell type was mixed, the majority of them were clear cells, accounting for 76.5% (13/17 ). Tumor hemorrhage, the number of cells and arranged in close, with tumor infiltration of inflammatory cells were 76.5% (13/17), 70.6% (12/17), 41.2% (7/17). Conclusion: The density of high density renal cell carcinoma is smaller (less than 6cm) and the CT value of plain CT is 5 ~ 10HU higher than normal renal parenchyma. Pathological analysis showed that there may be intra-tumor hemorrhage, the number of tumor cells and arranged closely, the tumor infiltration of inflammatory cells.