Table 3 Relation between proposed criteria of cystic renal lesion and malignancy

Wall enhancement

FET = 3.59

 No

3 (7.7)

0

P = 0.096

 Yes

36 (92.3)

45 (100)

Septal enhancement

 No

12 (30.8)

3 (6.7)

χ² = 8.28

 Yes

27 (69.2)

42 (93.3)

P = 0.004*

Number of septa

 No

6 (15.4)

3 (6.7)

χ² = 5.94

 Few

8 (20.5)

3 (6.7)

P = 0.051

Multiple

25 (64.1)

39 (86.7)

Wall thickness (mm)

3 (1–10)

4 (2–8)

z = 4.45

Median (range)

p < 0.001*

Septal thickness (mm)

2 (1–8)

4 (2–6)

z = 4.87

median (range)

p < 0.001*

Mural nodule

 No

35 (89.7)

4 (8.9)

MC = 55.56

 ≤ 3-mm obtuse convex protrusion

0

14 (31.1)

P < 0.001*

27 (60)

 ≥ 4-mm obtuse convex protrusion or acute convex protrusion, any size

4 (10.3)

T2

 Homogenous low

2 (5.1)

0

P = 0.212

 Homogenous high

25 (64.1)

1 (2.2)

P < 0.001*

 Heterogenous low

3 (7.7)

3 (6.7)

P = 1.0

 Heterogenous high

9 (23.1)

41 (91.1)

P < 0.001*

T1

 Homogenous low

28 (71.8)

1 (2.2)

P < 0.001*

 Heterogenous low

8 (20.5)

36 (80)

P < 0.001*

 Heterogenous high

3 (7.7)

8 (17.8)

P = 0.17