Table 1 The general demographic and clinicopathological features of mucinous colon adenocarcinoma liver metastasis (M-CLM) and classical colon adenocarcinoma liver metastasis (A-CLM) patients
Variables | A-CLM (5510) | M-CLM (306) | P value |
|---|---|---|---|
Race | |||
 White | 4102 (74.4%) | 232 (75.8%) |  |
 Black | 935 (17.0%) | 55 (18.0%) |  |
 Others | 473 (8.6%) | 19 (6.2%) | 0.501 |
Age (years) | |||
  ≤ 60 | 2023 (36.7%) | 101 (33.0%) |  |
 >60 | 3487 (63.3%) | 205 (67.0%) | 0.190 |
Sex | |||
 Female | 2439 (44.3%) | 153 (50.0%) |  |
 Male | 3071 (55.7%) | 153 (50.0%) | 0.049 |
CEA | |||
 Normal | 593 (10.8%) | 33 (10.8%) |  |
 Elevated | 3244 (58.9%) | 184 (60.1%) |  |
 Unknown | 1673 (30.4%) | 89 (29.1%) | 0.890 |
Primary tumor size (cm) | |||
  ≤ 5 | 2408 (43.7%) | 119 (38.9%) |  |
 >5 | 1860 (33.8%) | 156 (51.0%) |  |
 Unknown | 1242 (22.5%) | 39 (10.1%) | < 0.001 |
Tumor number | |||
 Solitary | 4435 (80.5%) | 248 (81.0%) |  |
 Multiple | 1075 (19.5%) | 58 (19.0%) | 0.811 |
Location | |||
 Right colon | 2403 (43.6%) | 181 (59.2%) |  |
 Transverse colon | 486 (8.8%) | 34 (11.1%) |  |
 Left colon | 2621 (47.6%) | 91 (29.7%) | < 0.001 |
Differentiation | |||
 Grade I/II | 3634 (66.0%) | 188 (61.4%) |  |
 Grade III/IV | 1172 (21.3%) | 79 (25.8%) |  |
 Unknown | 704 (12.8%) | 39 (12.7%) | 0.158 |
pT stage | |||
 0–2 | 562 (10.2%) | 24 (7.8%) |  |
 3–4 | 3892 (70.6%) | 260 (85.0%) |  |
 Unknown | 1054 (19.1%) | 22 (7.2%) | < 0.001 |
pN stage | |||
 N0 | 1668 (30.3%) | 62 (20.3%) |  |
 N+ | 3391 (61.5%) | 233 (76.1%) |  |
 Unknown | 451 (8.2%) | 11 (3.6%) | < 0.001 |
Examined lymph nodes | 12.52 ± 11.43 | 16.26 ± 10.41 | < 0.001 |
Positive lymph nodes | 4.41 ± 5.04 | 5.37 ± 5.84 | 0.003 |
Surgery type | |||
 No surgery | 1627 (29.5%) | 34 (11.1%) |  |
 Any surgery | 3876 (70.3%) | 272 (88.9%) |  |
 Unknown | 7 (0.2%) | 0 (0%) | < 0.001 |