肾细胞癌的MRI影像分析

目的分析肾细胞癌亚型MRI信号平扫特点及增强表现,提高对肾细胞癌的诊断水平。方法收集有完整临床资料及病理证实肾细胞癌48例,均做T_1WI、T_2WI、TRUFI序列平扫及增强扫描,其中15例行MRI动态增强扫描。结果本组48命名透明细胞型41例,嫌色细胞型4例,乳头状细胞型3例。T_1WI均匀等或低信号33例,混杂信号15例;T2WI均匀高信号14例,等信号6例,混杂信号28例。显示假包膜者10例。增强扫描6例病灶均匀强化,34例不均匀强化,5例内壁不规则环状强化,3例均匀环状强化(假包膜强化)。结论 MRI能够准确诊断肾细胞癌,并有助于判断细胞亚型。

MRI analysis of renal cell carcinoma

Objective To analyze MRI manifestation and enhancement of renal cell carcinoma, and to improve the diagnosis of renal cell carcinoma. Methods 48 cases of renal cell carcinoma proven by surgery and pathology were reviewed. MRI scans including T1WI, T2WI, TRUFI and contrast enhancement were carried out in all cases and dynamic contrast-enhanced MRI was performed in 15. Results Of the 48 cases, there were clear cell carcinoma in 41, chromophobe cell carcinoma in 4 and papillary cell carcinoma in 3. The tumors were homogeneously T1 iso-or hypointense in 33 and heterogeneous in 15; homogeneously T2 hyperintense in 14, isointense in 6 and heterogeneous in 28 patients. Pseudocapsule was found in 10 cases. Contrast enhancement was homogeneous in 6, heterogeneous in 34, irregularly peripheral within the wall in 5, and homogeneously circular in 3. Conclusion MRI can accurately diagnose renal cell carcinoma and help to determine the cell subsets.