CRC Subtype Diagnosis vs. CEA titers
| Final Diagnosis | Rising CEA Titers (Yes) | Rising CEA Titers (No) | Total | P Value |
| Colon CA | 12(75%) | 4 (25%) | 16 | 0.022 |
| Rectal CA | 20 (51.3%) | 19 (48.7%) | 39 | 0.022 |
| Rectosigmoid CA | 4 (100%) | 0 | 4 | 0.022 |
| Sigmoid CA | 8 (80%) | 2 (20%) | 10 | 0.022 |
| Other | 1 (100%) | 0 | 1 | 0.022 |
| TOTAL | 45 (64.3%) | 25 (35.7%) | 70 |