Number of people

Percentage (%)

Tumor fixation

Yes

No

3

11

21.4%

78.5%

Circumferential extension

>50%

<50%

Distance of lower pole and anal margin

>5 cm

<5 cm

Sphincter conservation

Yes

No

4

10

12

2

11

3

28.5%

71.4%

85.7%

14.2%

78.5%

21.4%