Table 3 MRI characteristics of UCS and EAC

Tumor dimension

 Anterior–posterior

4.11±2.36

2.43±0.87

0.88(0.81-0.98)

0.011*

 Longitudinal

6.37±3.67

4.61±1.77

0.87(0.80-0.97)

0.077

 Transverse

4.97±2.72

3.15±0.98

0.90(0.79-0.96)

0.015*

Boundary

0.79(0.73-0.93)

0.910

 Unclear

5

8

 Clear

12

26

Cystic degeneration or necrosis

0.80(0.71-0.89)

<0.001*

 Yes

11

0

 No

6

34

Hemorrhage

0.82(0.74-0.95)

<0.001*

 Yes

8

2

 No

9

33

Signalintensity on T2WI

0.85(0.78-0.96)

<0.001*

 homogeneous

4

32

 heterogeneous

13

2

RSI-T2(mean ± SD)

1.97±0.47

1.41±0.32

0.73(0.63-0.81)

<0.001*

RSI-T1

0.87±0.09

0.93±0.18

0.71(0.60-0.78)

0.202

RSI-DWI

2.76±0.57

2.72±0.49

0.69(0.58-0.76)

0.771

ADCmax

1166.18±325.37

752.35±81.22

0.65(0.53-0.82)

<0.001*

ADCmin

598.23±145.71

608.94±94.47

0.74(0.62-0.84)

0.753

ADCmean

904.85±187.24

672.06±86.54

0.67(0.59-0.91)

<0.001*

RSI-ADCmax

0.71±0.15

0.53±0.12

0.62(0.49-0.72)

<0.001*

RSI-ADCmin

0.37±0.11

0.43±0.11

0.59(0.38-0.65)

0.106

RSI-ADCmean

0.55±0.10

0.47±0.11

0.66(0.53-0.81)

0.019*

REAmax

0.69±0.27

0.24±0.10

0.58(0.39-0.75)

<0.001*

REAmin

0.31±0.13

0.11±0.10

0.55(0.47-0.78)

<0.001*

REAmean

0.44±0.14

0.17±0.09

0.62(0.54-0.82)

<0.001*

REVmax

0.64±0.25

0.29±0.13

0.61(0.43-0.77)

<0.001*

REVmin

0.29±0.13

0.21±0.12

0.54(0.38-0.79)

0.031*

REVmean

0.42±0.16

0.24±0.12

0.67(0.40-0.84)

0.001*

Feeding artery

0.85(0.73-0.92)

0.021*

 Yes

6

2

 No

11

32

Areas of strong enhancement

0.83(0.69-0.88)

<0.001*

 Yes

13

0

 No

4

34