Table 1.
Baseline characteristics of 654 colorectal cancer patients with mismatch repair deficiency
| Characteristic | No. of cases (%) |
|---|---|
| Sex | |
| Female | 253 (38.7) |
| Male | 401 (61.3) |
| Age (years) | |
| <50 | 229 (35.0) |
| 50∼ | 186 (28.4) |
| 60∼ | 154 (23.5) |
| 70∼ | 85 (13.0) |
| Tumor site | |
| Right colon | 340 (52.0) |
| Left colon | 146 (22.3) |
| Rectum | 144 (22.0) |
| Multiple locations | 24 (3.7) |
| Family history | |
| Yes | 223 (34.1) |
| No | 431 (65.9) |
| Tumor differentiation | |
| Well or moderate | 433 (66.2) |
| Poor | 185 (28.3) |
| N.A. | 36 (5.5) |
| Histology of primary tumor | |
| Adenocarcinoma | 400 (61.2) |
| Mucinous adenocarcinoma | 250 (38.2) |
| Others | 4 (0.6) |
| Lymphovascular invasion | |
| Yes | 128 (19.6) |
| No | 522 (79.8) |
| N.A. | 4 (0.6) |
| Perineural invasion | |
| Yes | 94 (14.4) |
| No | 555 (84.9) |
| N.A. | 5 (0.7) |
| T category | |
| Tis | 2 (0.3) |
| 1 | 27 (4.1) |
| 2 | 90 (13.8) |
| 3 | 287 (43.9) |
| 4 | 244 (37.3) |
| Tx | 4 (0.6) |
| N category | |
| 0 | 480 (73.4) |
| 1 | 123 (18.8) |
| 2 | 46 (7.0) |
| Nx | 5 (0.8) |
| M category | |
| 0 | 576 (88.1) |
| 1 | 75 (11.5) |
| Mx | 3 (0.4) |
| Stage | |
| 0 | 1 (0.2) |
| I | 104 (15.9) |
| II | 355 (54.3) |
| III | 115 (17.6) |
| IV | 75 (11.5) |
| N.A. | 4 (0.6) |
N.A., not available.