Table 1 Patient, tumor, and treatment characteristics
Characteristics | Number of patients | Percent |
|---|---|---|
Sex | ||
Male | 57 | 68.7 |
Female | 26 | 31.3 |
Age (years) | ||
Median | 66 | |
Range | 32–84 | |
CEA (ng/mL) | ||
Median | 2.36 | |
Range | 0.5–18.32 | |
Unknown | 9 patients | |
Tumor size (cm) | ||
Median | 2 | |
Range | 0.6–5.2 | |
Tumor location (cm from anal verge) | ||
Median | 5 | |
Range | 2–20 | |
T-stage | ||
1 | 68 | 81.9 |
2 | 15 | 18.1 |
Differentiation | ||
Well differentiated | 46 | 55.4 |
Moderately differentiated | 32 | 38.6 |
Poorly differentiated | 2 | 2.4 |
Unknown | 3 | 3.6 |
Lymphovascular invasion | ||
No | 41 | 49.4 |
Yes | 13 | 15.7 |
Unknown | 29 | 34.9 |
Perineural invasion | ||
No | 42 | 50.6 |
Yes | 1 | 1.2 |
Unknown | 40 | 48.2 |
Resection margin | ||
> 3 mm | 3 | 3.6 |
≤ 3 mm | 22 | 26.5 |
Unknown | 58 | 69.9 |
Local excision | ||
Endoscopic mucosal resection | 21 | 25.3 |
Endoscopic submucosal dissection | 4 | 4.8 |
Transanal excision | 58 | 69.9 |
Radiotherapy (Gy) | ||
Median | 50.4 | |
Range | 39.6–59.4 | |
Concurrent chemotherapy | ||
No chemotherapy | 2 | 2.4 |
FL | 79 | 95.2 |
FP | 2 | 2.4 |
Adjuvant chemotherapy | ||
No chemotherapy | 69 | 83.1 |
5-FU | 13 | 15.7 |
oral 5-FU prodrug | 1 | 1.2 |