Colorectal cancer lymph node staining by activated carbon nanoparticles suspension in vivo or methylene blue in vitro

Table 1 Clinicopathological details of the 60 patients in the three groups

	Group A	Group B	Group C
No. of patients	20	20	20
Age (yr)	57.5 ± 11.5	58.9 ± 17.8	64.9 ± 7.4
Gender
Male	14	14	13
Female	6	6	7
Tumor location
Right colon	2	2	4
Transverse colon	1	1	1
Left colon	5	1	1
Sigmoid	5	4	4
Rectum	7	12	11
Tumor diameter (mm)	5.0 ± 1.7	4.7 ± 2.3	3.7 ± 1.1
T-stage
T1	0	1	0
T2	2	4	4
T3	6	7	7
T4	12	8	9
Degree of differentiation
Well	7	7	8
Moderate	10	11	11
Poor	3	2	1
Postoperative complications
Bleeding	1	0	0
Infection	0	1	0
Fistula	1	1	2
Abdominal tube drainage (d)	6.7 ± 2.8	6.1 ± 3.3	7.8 ± 3.6