Table 1.

Patient Characteristics

Characteristic	Total (n = 40)
Sex
Male	26
Female	14
Median age (years)	68.5 (36–81)
Median tumor size (mm)	33.5 (8.3–76.0)
Median CEA level pre-CRT (ng/ml)	9.0 (1.0–1022.0)
Median CEA level post-CRT (ng/ml)	3.0 (1.0–108.0)
Operation
Tumorectomy*	2
Low anterior resection	6
Abdominoperineal resection	10
Total pelvic exenteration	22
Concomitant sacrectomy
Done	21
Not done	19
Resection Status
R0	36
R1	4
Tumor Regression Grade (TRG)
TRG1–2	17
TRG3–4	23

*Tumor resection without adjacent organs