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Table 1 Patient demographics and the characteristics of the primary tumor(s)

From: Clinical features and prognosis in hepatectomy for colorectal cancer with centrally located liver metastasis

  Centrally located Peripherally located P values
( n = 24) ( n = 135)
Gender
 Male 19 (79.2%) 70 (51.9%) 0.014
 Female 5 (20.8%) 65 (48.1%)  
Age (year) 58.5 ± 2.4 (29–75) 59.7 ± 1.0 (24–86) 0.62
Location of the primary tumor(s)
 Rectum 13 (54.2%) 56 (41.5%) 0.541
 Sigmoid colon 6 (25.0%) 28 (20.7%)  
 Descending colon 1 (4.2%) 10 (7.4%)  
 Transverse colon 3 (12.5%) 15 (11.1%)  
 Ascending colon and cecum 1 (4.2%) 22 (16.3%)  
 Synchronousa 0 (0.0%) 4 (3.0%)  
Primary tumor staging
 T1 or T2 2 (8.3%) 6 (4.4%) 0.437
 T3 7 (29.2%) 56 (41.5%)  
 T4 15 (62.5%) 73 (54.1%)  
Regional lymph node metastasis
 N0 6 (25.0%) 26 (19.3%) 0.705
 N1 8 (33.3%) 56 (41.5%)  
 N2 10 (41.7%) 53 (39.3%)  
Primary extrahepatic metastasis 6 (25.0%) 12 (8.9%) 0.033
Associated risky presentation(s)b 5 (20.8%) 16 (11.9%) 0.321
  1. aSynchronous: two or more primary colorectal cancers identified at the same time; bAssociated risky presentation(s) included obstruction, tumor rupture/perforation, or both.