Pathological characteristics of colorectal cancer according to tumour location bowel subsite
| Pathological feature | Total N | Caecum | Ascending colon | Hepatic flexure | Transverse colon | Splenic flexure | Descending colon | Sigmoid colon | Rectosigmoid | Rectum | p Value |
| Disease stage | <0.0001 | ||||||||||
| I | 339 (26%) | 53 (24%) | 59 (22%) | 12 (29%) | 16 (18%) | 7 (22%) | 12 (16%) | 84 (31%) | 33 (34%) | 63 (33%) | |
| II | 403 (31%) | 75 (34%) | 108 (40%) | 15 (36%) | 35 (40%) | 9 (28%) | 32 (43%) | 67 (25%) | 24 (25%) | 38 (20%) | |
| III | 357 (28%) | 57 (26%) | 61 (22%) | 9 (21%) | 21 (24%) | 9 (28%) | 25 (34%) | 77 (28%) | 30 (31%) | 68 (36%) | |
| IV | 187 (15%) | 36 (16%) | 44 (16%) | 6 (14%) | 16 (18%) | 7 (22%) | 5 (6.8%) | 44 (16%) | 9 (9.4%) | 20 (11%) | |
| Tumour differentiation | <0.0001 | ||||||||||
| Well to moderate | 1286 (90%) | 214 (88%) | 234 (80%) | 37 (80%) | 77 (86%) | 28 (85%) | 81 (98%) | 298 (96%) | 103 (98%) | 214 (96%) | |
| Poor | 140 (9.8%) | 28 (12%) | 58 (20%) | 9 (20%) | 13 (14%) | 5 (15%) | 2 (2.4%) | 13 (4.2%) | 2 (1.9%) | 10 (4.5%) | |
| Mucinous component | <0.0001 | ||||||||||
| 0% | 836 (62%) | 116 (49%) | 138 (48%) | 18 (45%) | 41 (48%) | 17 (52%) | 57 (71%) | 217 (75%) | 71 (75%) | 161 (79%) | |
| 1–49% | 340 (25%) | 82 (35%) | 93 (33%) | 10 (25%) | 27 (31%) | 12 (36%) | 16 (20%) | 52 (18%) | 19 (20%) | 29 (14%) | |
| ≥50% | 175 (13%) | 39 (16%) | 55 (19%) | 12 (30%) | 18 (21%) | 4 (12%) | 7 (8.8%) | 22 (7.6%) | 5 (5.3%) | 13 (6.4%) | |
| Signet ring cell component | <0.0001 | ||||||||||
| 0% | 1201 (89%) | 207 (88%) | 224 (79%) | 33 (83%) | 70 (82%) | 32 (97%) | 75 (94%) | 278 (96%) | 94 (99%) | 189 (93%) | |
| 1–49% | 123 (9.1%) | 27 (11%) | 50 (18%) | 7 (18%) | 12 (14%) | 1 (3.0%) | 5 (6.3%) | 10 (3.4%) | 1 (1.1%) | 10 (4.9%) | |
| ≥50% | 23 (1.7%) | 2 (0.9%) | 11 (3.9%) | 0 | 3 (3.5%) | 0 | 0 | 3 (1.0%) | 0 | 4 (2.0%) |
(%) Indicates the proportion of cases with a specific pathological feature among cancers located in each subsite (caecum, ascending colon, hepatic flexure, transverse colon, splenic flexure, descending colon, sigmoid colon, rectosigmoid or rectum). p Values were calculated by the χ2 test.