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

doi:10.3877/cma.j.issn.2095-5782.2022.01.010

Abstract

Abstract:

Objective

To explore common CT differential diagnosis findings between renal oncocytoma (RO) and chromophobe renal cell carcinoma (ChRCC) for different size lesions.

Methods

Double-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).

Conclusions

Comprehensive analysis of lesion size and CT features is helpful for diagnosing and distinguishing RO and ChRCC accurately.

Key words: Oncocytoma, Choromophobe renal cell carcinoma, CT, Central scar, Segmental enhancement inversion

Guojie Wang, Peixin Qin, Xiangmeng Chen, Kunwei Li, Wansheng Long. The effect of size on CT findings of renal oncocytoma and chromophobe renal cell carcinoma[J]. Chinese Journal of Interventional Radiology(Electronic Edition), 2022, 10(01): 56-60.

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URL: https://zhjrfsxdzzz.cma-cmc.com.cn/EN/10.3877/cma.j.issn.2095-5782.2022.01.010

https://zhjrfsxdzzz.cma-cmc.com.cn/EN/Y2022/V10/I01/56

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References 14

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CT征象/病种	≤3 cm（11）		> 3 cm（26）
CT征象/病种	RO（8）	ChRCC（3）	RO（8）	ChRCC（18）
中央瘢痕	1	0	7	13
节段性强化反转	6	0	1	2
辐轮状强化	0	0	0	6
钙化	0	0	2	9
皮髓期强化程度	8	1	4	2

CT征象/病种	≤3 cm（11）		> 3 cm（26）
CT征象/病种	RO（8）	ChRCC（3）	RO（8）	ChRCC（18）
中央瘢痕	1	0	7	13
节段性强化反转	6	0	1	2
辐轮状强化	0	0	0	6
钙化	0	0	2	9
皮髓期强化程度	8	1	4	2

CT征象	RO比较ChRCC		≤3 cm组比较> 3 cm组
CT征象	χ²值	P值	χ²值	P值
中央瘢痕	0.524	0.520	15.624	0.000
节段性强化反转	5.779	0.024	7.767	0.011
辐轮状强化	5.456	0.027	3.030	0.151
钙化	4.006	0.071	6.623	0.015
皮髓期强化程度	13.887	0.001	11.065	0.002

CT征象	RO比较ChRCC		≤3 cm组比较> 3 cm组
CT征象	χ²值	P值	χ²值	P值
中央瘢痕	0.524	0.520	15.624	0.000
节段性强化反转	5.779	0.024	7.767	0.011
辐轮状强化	5.456	0.027	3.030	0.151
钙化	4.006	0.071	6.623	0.015
皮髓期强化程度	13.887	0.001	11.065	0.002

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