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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.