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Table 3 Staging of the lymph-nodes

From: Preoperative endoscopic tattooing to mark the tumour site does not improve lymph node retrieval in colorectal cancer: a retrospective cohort study

 

Tattooed group N = 107

Control group N = 143

P

N of lymph nodes examined

16.0 (12–24)

17.0 (12–21)

0.90

N of nodes examined in colonic cancer

17.0 (12–24)

18.0 (13–23.75)

0.40

Right colon

21.0 (14–28)

19.0 (15.25-26)

 

Tansverse colon

14.0a

15.0 (9–19)

 

Left colon

14.5 (11–21.5)

16.0 (12–20)

 

N of nodes examined in rectal cancer

12.0 (9.75-28.25)

13.0 (10.75-20)

0.70

pN stage in colon cancers b

  

0.70

0

50 (55%)

50 (58%)

 

1

23 (25%)

19 (22%)

 

2

18 (20%)

17 (20%)

 

pN stage in rectal cancers

  

0.60

0

5 (50%)

25 (53%)

 

1

4 (40%)

13 (28%)

 

2

1 (10%)

9 (19%)

 

N adequate lymphadenectomy (≥12)

84 (78%)

113 (79%)

 

Colonic cancer

78/97 (80%)

80/96 (83%)

0.40

Rectal cancer

6/10 (60%)

33/47 (71%)

0.30

  1. aOnly one tattooed patient had a tumour centrally located in the transverse colon and underwent a transverse colectomy.
  2. bIn 13 patients final pathology revealed an adenoma with high or moderate dysplasia.