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Table 1 The demographic data and morphological features of ccRCC and AML.wovf

From: Differentiation of renal angiomyolipoma without visible fat from small clear cell renal cell carcinoma by using specific region of interest on contrast-enhanced CT: a new combination of quantitative tools

 

ccRCC (n = 74)

AML.wovf (n = 31)

χ2/t

P

Age (years)

54.61 ± 11.44

51.00 ± 10.71

1.508*

0.135

Size (cm)

2.80 ± 0.71

2.70 ± 0.62

0.666*

0.507

Gender

  

15.661

 < 0.001

 Male

48 (64.9)

7 (22.6)

  

 Female

26 (35.1)

24 (77.4)

  

Location

  

0.205

0.651

 Left kidney

37 (50.0)

17 (54.8)

  

 Right kidney

37 (50.0)

14 (45.2)

  

Growth pattern of tumor

  

2.849

0.091

 Endophytic

42 (56.8)

12 (38.7)

  

 Exophytic

32 (43.2)

19 (61.3)

  

Pseudocapsule sign

  

8.544

0.003

 Observed

25 (33.8)

2 (6.5)

  

 Not observed

49 (66.2)

29 (93.5)

  

Cystic degeneration

  

7.812

0.005

 Observed

36 (48.6)

6 (19.4)

  

 Not observed

38 (51.4)

25 (80.6)

  

Angular interface

  

11.693

0.001

 Observed

9 (12.2)

13 (41.9)

  

 Not observed

65 (87.8)

18 (58.1)

  
  1. ccRCC: clear cell renal cell carcinoma, AML.wovf: angiomyolipoma without visible fat
  2. *t value
  3. Data are numbers of patients with a given tumor. Data in parentheses are percentages. Age and diameter are means ± standard deviations
  4. The independent sample t-test was applied in the analysis of age and diameter comparisons, the chi-square test was applied in the rest of the comparisons