Table 2.
Correlation between pancreatic cancer patients with/without associated double primary tumors from other organs and clinicopathologic factors
| Characteristic | Pancreatic cancer only (n=818) | Pancreatic cancer with double primary tumors (n=113) | p-value |
|---|---|---|---|
| Age, mean±SD (yr) | 59.3±9.8 | 63.4±9.3 | < 0.001 |
| Sex | |||
| Male | 486 (59.4) | 82 (72.6) | 0.007 |
| Female | 332 (40.6) | 31 (27.4) | |
| pT category of pancreatic cancer | |||
| pT1 | 12 (1.5) | 2 (1.8) | 0.234 |
| pT2 | 23 (2.8) | 4 (3.5) | |
| pT3 | 756 (92.4) | 99 (87.6) | |
| pT4 | 27 (3.3) | 8 (7.1) | |
| pN category of pancreatic cancer | |||
| pN0 | 343 (42.9) | 49 (45.4) | 0.623 |
| pN1 | 457 (57.1) | 59 (54.6) | |
| M category of pancreatic cancer | |||
| pM0 | 782 (95.6) | 109 (96.5) | 0.672 |
| pM1 | 36 (4.4) | 4 (3.5) | |
| Lymphovascular invasion | |||
| Absent | 480 (59.6) | 66 (58.9) | 0.900 |
| Present | 326 (40.4) | 46 (41.1) | |
| Perineural invasion | |||
| Absent | 117 (16.2) | 24 (22.9) | 0.089 |
| Present | 606 (83.8) | 81 (77.1) | |
| Differentiation | |||
| Well | 81 (10.2) | 10 (10.0) | 0.323 |
| Moderate | 601 (75.4) | 81 (81.0) | |
| Poor | 115 (14.4) | 9 (9.0) | |
| Treatment | |||
| Surgery | 308 (37.7) | 39 (34.5) | 0.862 |
| Surgery with CTx | 402 (49.1) | 57 (50.4) | |
| Surgery with RTx | 4 (0.5) | 1 (0.9) | |
| Surgery with CTx+RTx | 104 (12.7) | 16 (14.2) |
Values are presented as number (%) unless otherwise indicated. SD, standard deviation; CTx, chemotherapy; RTx, radiation therapy.