Clinical efficacy and pathological outcomes of transanal endoscopic intersphincteric resection for low rectal cancer

Table 1 Preoperative characteristics of 45 patients with rectal cancer who underwent transanal endoscopic intersphincteric resection

Characteristic	Data
Sex
Female	16 (35.56)
Male	29 (64.44)
Age in yr	57.91 ± 12.571
BMI in kg/m2	23.39 ± 3.41
Weight in kg	64.13 ± 11.40
Hight in cm	163.93 ± 6.93
Hypertension	9 (20.00)
Diabetic	6 (13.33)
ASA grading
I	4 (8.89)
II	33 (73.33)
III	8 (17.78)
Neoadjuvant chemoradiotherapy
No	33 (73.33)
Yes	12 (26.67)
Height from anal verge in cm	3.87 (2.50-5.00)

Data are mean ± SD or n (%). ASA: American Society of Anesthesiologists; BMI: Body mass index.

Table 2 Perioperative results of 45 patients with rectal cancer who underwent transanal endoscopic intersphincteric resection

Characteristic	Data
Operative time in min	221.22 (120-345)
Intraoperative blood loss in mL	49.11 (20-300)
Anastomotic technique
Stapled	19 (42.22)
Manual	26 (57.78)
Ileostomy or colostomy
Yes	45 (100)
No	0
Postoperative hospital stay in d	10.29 (5-24)
Time to first soft diet in d	5.47 (2-18)
Removal of abdominal drainage in d	8.76 (4-21)
Removal of gastric tube in d	1.18 (0-3)
Overall postoperative complications	10 (22.22)
Anastomotic leakage
Grade A	1 (2.22)
Grade B	1 (2.22)
Grade C	0
Intestinal obstruction	3 (6.67)
Urinary retention	1 (2.22)
Pelvic abscess	1 (2.22)
Pulmonary infection	6 (13.33)
Pleural effusion	1 (2.22)
Clavien-Dindo classification
Dindo I–II	8 (17.78)
Dindo III–IV	2 (4.44)
Dindo V	0
Readmission within 30 d	0
Death within 30 d	0

Data are mean ± SD or n (%).

Table 3 Pathologic results of 45 patients with rectal cancer who underwent transanal endoscopic intersphincteric resection

Characteristic	Data
Pathological T stage
T1	3 (6.67)
T2	32 (71.11)
T3	10 (22.22)
Pathological N stage
N0	31 (68.89)
N1	10 (22.22)
N2	4 (8.89)
Pathological TNM stage
I	24 (53.33)
II	7 (15.56)
III	14 (31.11)
Tumor size in cm	2.86 (0.80-4.60)
Number of lymph nodes harvested	19.56 (8-40)
Number of positive lymph nodes	0.91 (0-7.0)
Length between tumor and DRM in cm	2.30 ± 0.62
CRM status
Positive	0
Negative	45 (100)
DRM status
Positive	0
Negative	45 (100)

Data are mean ± SD or n (%). Tumors were classified according to the American Joint Committee on Cancer tumor-node-metastasis system. CRM: Circumferential resection margin; DRM: Distal resection margin; TNM: Tumor-node-metastasis.