病灶大小对肾脏嗜酸细胞腺瘤及嫌色细胞癌CT征象的影响

目的研究肾脏嗜酸细胞腺瘤（RO）与嫌色细胞癌（ChRCC）常见的CT鉴别征象是否与病灶大小相关，进一步提高诊断的准确性。 方法回顾性分析病理证实的16例RO和21例ChRCC的CT图像，分析其平扫、增强特征是否存在差异，再将病例分为≤3 cm组（RO 8例，ChRCC 3例）、>3 cm组（RO 8例，ChRCC 18例），比较其特征在组间是否存在差异。 结果（1）RO与ChRCC病灶大小无统计学差异（P = 0.118）；（2）RO与ChRCC在节段性强化反转、辐轮状强化及皮髓期强化程度三种特征上存在统计学差异，P值分别为0.024、0.027、0.001，中央瘢痕、钙化两种征象无统计学差异，P值分别为0.520、0.071；（3）≤3 cm、> 3 cm组间中央瘢痕、节段性强化反转、钙化、皮髓期强化程度存在统计学差异，P值分别为0.000、0.011、0.015、0.002。 结论综合分析病灶的大小及CT征象，有助于准确鉴别RO与ChRCC。

The effect of size on CT findings of renal oncocytoma and chromophobe renal cell carcinoma

ObjectiveTo explore common CT differential diagnosis findings between renal oncocytoma (RO) and chromophobe renal cell carcinoma (ChRCC) for different size lesions. MethodsDouble-blind methods were used to retrospectively analyze the CT images of 16 cases of RO and 21 cases of ChRCC. The CT features of different tumors were analyzed and compared. The cases were then divided into two groups according to size, ≤3 cm in diameter were classified as group one, and > 3 cm in diameter were classified as group two, the characteristics were compared between the two groups. Results(1) There was no statistically significant differences between RO and ChRCC in lesions diameter (P = 0.118); (2) Statistically significant differences between RO and ChRCC were shown in segmental enhancement inversion, spoke-wheel-like enhancement and degree of enhancement in the cortical phase (P = 0.024, 0.027, 0.001), but not shown in central scar and calcification (P = 0.520, 0.071); (3) There were statistically significant differences between group one and group two in central-scar, segmental enhancement inversion, calcification and degree of enhancement in the cortical phase (P = 0.000, 0.011, 0.015, 0.002). ConclusionsComprehensive analysis of lesion size and CT features is helpful for diagnosing and distinguishing RO and ChRCC accurately.