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[目的]探讨长径≤3cm的肾透明细胞癌(clear cell renal cell carcinoma,CCRCC)与乏脂肪血管平滑肌脂肪瘤(angiomyolipoma,AML)的CT特征,比较两者的影像学异同点,以提高两者鉴别诊断准确性。[方法]回顾性分析经手术病理证实的16例CCRCC和18例乏脂肪AML,对其CT形态学特征、CT平扫及增强CT值的差异进行分析。[结果]两组病灶在长径、形态、早期排泄期CT值及早期排泄期强化幅度上的差异无统计学意义(P>0.05)。病灶内囊变坏死的差异有统计学意义(P<0.05)。病灶在平扫密度、强化均匀性、假包膜征象、增强后皮髓质交界期CT值、皮髓质交界期强化幅度间的差异有显著统计学意义(P<0.01)。[结论]CCRCC与乏脂肪AML病灶的囊变坏死、平扫密度、强化均匀性、假包膜征象、增强后皮髓质交界期CT值及强化幅度有差异,对两者的鉴别诊断起重要作用。
[Objective] To investigate the CT features of clear cell renal cell carcinoma (CCRCC) and non-small cell angiomyolipoma (AML) with a diameter of less than 3 cm, and to compare the similarities and differences between the two methods in order to improve the accuracy of the two Differential diagnosis accuracy. [Methods] A retrospective analysis of 16 cases of CCRCC and 18 cases of non-fat AML confirmed by surgery and pathology was performed to analyze the difference of CT morphological features, CT scan and CT value. [Results] There was no significant difference in CT value and early excretion phase of long axis, shape, early excretion between the two groups (P> 0.05). The difference of necrosis of internal capsule was statistically significant (P <0.05). There were significant differences in the extent of lesion between plain density, enhanced homogeneity, pseudocapsule sign, enhanced posterior cingulum junction CT value, and corticomedullary junction enhancement amplitude (P <0.01). [Conclusion] The cystic degeneration and necrosis of the CCRCC and the non-fat AML lesion, the average density of the lesion, the homogeneity of the lesion, the sign of the pseudocapsule, the CT value and the extent of enhancement of the borderline of the enhanced corticomedullary are different effect.