Table 3 Pathological findings, surveillance, and treatment methods of synchronous CRC patients
From: Clinical characteristics of synchronous colorectal cancers in Japan
| Â | Index | S2 | S3 | S4 | S5 |
|---|---|---|---|---|---|
Number of patients | 84 | 84 | 16 | 8 | 1 |
 Location of tumor | |||||
  Right side | 26 31.0 %) | 31 (36.9 %) | 3 (18.8 %) | 1 (12.5 %) | 1 |
  Left-side | 37 (44.0 %) | 37 (44.0 %) | 10 (62.5 %) | 7 (87.5 %) | 0 |
  Rectum | 21 (25.0 %) | 16 (19.0 %) | 3 (18.8 %) | 0 | 0 |
   P value |  | 0.58 | 0.47 | 0.081 |  |
  Average size, mm ± SD | 43.8 ± 19.0 | 23.9 ± 15.1 | 18.0 ± 8.3 | 14.9 ± 1.5 | 15 |
   P value* |  | <0.001 | <0.001 | <0.001 | N.A. |
 T stage | |||||
  Tis | 0 (0 %) | 39 (46.4 %) | 11 (68.8 %) | 6 (75 %) | 1 |
  T1 | 7 (8.3 %) | 23 (27.4 %) | 4 (25 %) | 1 (12.5 %) | 0 |
  T2 | 12 (14.3 %) | 8 (9.5 %) | 1 (6.25 %) | 0 | 0 |
  T3 | 49 (58.3 %) | 10 (11.9 %) | 0 | 0 | 0 |
  T4 | 16 (19 %) | 1 (1.2 %) | 0 | 0 | 0 |
  No residual/uncertaina | 0 | 3 (3.6 %) | 0 | 1 (12.5 %) | 0 |
   P value |  | <0.001 | <0.001 | <0.001 | N.A. |
 Histological type | |||||
  pap + well + mod | 83 (98.8 %) | 81 (96.4 %) | 14 (87.5 %) | 6 (75 %) | 0 |
  poor + muc + sig | 1 (1.2 %) | 0 | 0 | 0 | 0 |
  Others/no residual/uncertain†| 0 | 3 (3.6 %) | 2 (12.5 %) | 2 (25 %) | 1 |
   P value |  | 1 | 1 | 1 | N.A. |
 Diagnosis methods | |||||
  Endoscopy (pre-op) | 84 (100 %) | 75 (89.3 %) | 12 (75 %) | 7 (87.5 %) | 1 |
  3DCT | 0 | 2 (2.4 %) | 0 | 0 | 0 |
  Barium enema study | 0 | 2 (2.4 %) | 1 (6.25 %) | 0 | 0 |
  Endoscopy (intra-op) | 0 | 1 (1.2 %) | 0 | 0 | 0 |
  Post-op pathologically | 0 | 4 (4.8 %) | 3 (18.8 %) | 1 (12.5 %) | 0 |
 Treatment methods | |||||
  Endoscopic resection | 0 | 24 (28.6 %) | 6 (37.5 %) | 5 (62.5 %) | 1 |
  Normal surgery | 69 (82.1 %) | 45 (53.6 %) | 9 (56.3 %) | 2 (25 %) | 0 |
  Extended surgery | 15 (17.9 %) | 15 (17.9 %) | 1 (6.25 %) | 1 (12.5 %) | 0 |