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Table 1 Patients’ characteristics (n = 20)

From: Measurement of distal intramural spread and the optimal distal resection by naked eyes after neoadjuvant radiation for rectal cancers

Variables

Value

Variables

Value

Age (years)

57.3 ± 14.4 a

ypT stage

 

Gender

 

 T1

1 (5%)

 Female

5 (25%)

 T2

9 (45%)

 Male

15 (75%)

 T3

10 (50%)

Distance between distal tumor margin to anal verge before radiotherapy (cm)

4.8 ± 1.7 a

ypN stage

 

Time interval between radiation and operation (days)

65.9 ± 17.8 a

 N0

11 (55%)

Type of resection

 

 N1/2

9 (45%)

 APR

3 (15%)

M stage

 

 LAR

17 (90%)

 M0

18 (90%)

Type of anastomosis

 

 M1

2 (10%)

 Stapler

16 (94.1%)

ypTNM Stagec

 

 Hand sewn

1 (5.9%)

 I

7 (35%)

Stoma

 

 II

5 (25%)

 Diverting loop ileostomy

16 (80%)

 III

6 (30%)

 End colostomy

3 (15%)

 IV

2 (10%)

 No stoma

1 (5%)

TRGd

 

cT stage

 

 I

6 (30%)

 T4

5 (25%)

 II

11 (55%)

 T3

13 (65%)

 III

3 (15%)

 T2

2 (10%)

Tumor involving 100% luminal circumference

 

cN stage

 

 Yes

4 (20%)

 N0

4 (20%)

 No

16 (80%)

 N1/2

16 (80%)

Diameter of tumor (cm) e

2.65 ± 1.05a

cTNM stage b

 

Moderately differentiated

20 (100%)

 I

1 (5%)

Tumor deposit

5 (25%)

 II

3 (15%)

Tumor budding

4 (20%)

 III

14 (70%)

Perineural invasion

4 (20%)

 IV

2 (10%)

No. of retrieved lymph nodes

9.9 ± 1.0a

  1. aMean ± SD
  2. bcTNM stage: clinical stage before radiotherapy according to AJCC 7th edition [10]
  3. cypTNM Stage: pathological stage after radiotherapy according to AJCC 7th edition [10]
  4. dTRG: tumor regression grade according to Ryan et al. [11]
  5. eThe longest diameter of the tumor