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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.