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Table 2 Radiological characteristics of SRMs on CT

From: Differential diagnosis and prognosis of small renal masses: association with collateral vessels detected using contrast-enhanced computed tomography

Variables

fpAML (n = 7)

RCC (n = 123)

P-value

Tumor size (mm); median (IQR)

25 (22–32)

26 (20–33)

0.8081

Tumor size (≤2 cm vs. > 2 cm)

1/6

26/97

1.0000

Tumor location

 Right/Left

2/5

54/69

0.6981

 Posterior/anterior

5/2

74/49

0.1263

 Lateral/Medial

4/3

76/47

1.0000

Exophytic/Endophytic

7/0

116/7

1.0000

Tumor shape (Round/Non-round)

2/5

68/55

0.4660

Tumor attenuation in the unenhanced phase (HU); median (IQR)

43 (26 − 49)

31 (25 − 38)

*0.0339

Homogeneity/Heterogeneity

6/1

16/107

* < 0.0001

OBS (+/−)

3/4

0/123

* < 0.0001

AI (+/−)

4/3

9/114

*0.0018

CV (+/−)

0/7

56/67

*0.0192

  1. CT, computed tomography; fpAML, fat-poor angiomyolipomas; RCC, renal cell carcinoma; IQR, interquartile range; HU, Hounsfield Unit; OBS, overflowing beer sign; AI, angular interface; CV, collateral vessel. *p < 0.05