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目的提高肾嗜酸性细胞腺瘤的影像诊断水平。方法回顾性分析6例经手术病理证实的肾嗜酸细胞瘤患者的 MR 表现。结果 5例为单发肿瘤,1例并发肾透明细胞癌。肿瘤呈圆形或类圆形。直径1.5～3.8 cm,境界清晰,均位于肾皮质区,向肾外突出。MR 平扫,3例 T_1WI 呈等信号,3例呈等低信号,其中1例中央可见裂隙状瘢痕更低信号;T_2WI 上3例呈等低信号,肿瘤内有混杂稍高信号,1例呈等稍低信号,中央瘢痕呈裂隙状高信号,2例呈低信号。动态增强扫描3例呈明显均匀强化;1例呈不均匀强化,但肿瘤实质部分强化均匀,中央瘢痕大部分延迟强化,少部分无强化;2例动脉期及静脉期扫描均呈“轮辐”状强化。结论 MR 检查能很好地显示肾嗜酸性细胞瘤,对临床诊断有帮助。
Objective To improve the imaging diagnosis of renal eosinophilic adenoma. Methods The MR findings of 6 patients with pathologically confirmed renal oncocytoma were retrospectively analyzed. Results of 5 cases of single tumor, 1 case of renal clear cell carcinoma. The tumor is round or oval. Diameter of 1.5 ~ 3.8 cm, the realm of clear, are located in the renal cortex, prominent outside the kidney. MR plain scan, 3 cases of T_1WI was equal signal, 3 cases showed low signal, including 1 case of central scarred scar visible signal; T_2WI 3 cases showed low signal, mixed slightly higher signal within the tumor, 1 was With a slightly lower signal, the central scar showed a slit-like high signal and two showed a low signal. Dynamic enhanced scan in 3 cases was significantly uniform enhancement; 1 case was uneven enhancement, but the tumor part of the uniform enhancement, most of the central scar delayed enhancement, and some without enhancement; 2 cases of arterial phase and venous phase scanning were "Strengthen the shape. Conclusion MR examination can show renal eosinophoblast, which is helpful for clinical diagnosis.