Transanal total mesorectal excision: A valid option for rectal cancer?

Table 1 Transanal total mesorectal excision and peri-operative outcomes (case series with n≥ 5)

Ref.	Number of patients	ORT	Conversion rate	Complications rate	LOS	Comment
Marks et al[25], 2010	79	NA	2.5%	29.9%	5	TATA approach
Tuech et al[22], 2015	56	270	7.3%	26%	10	-
Han et al[39], 2013	34	151.6	0	6 leaks	9	13 with low rectal tumors, 15 with upper rectal tumors and 6 with sigmoid tumors.
Rouanet et al[21], 2013	30	304	7%	Intraop: 10%	14	Difficult patients (male, high BMI, CRM threatened…)
				Postop: 30%
Muratore et al[20], 2015	26	241	NA	26.9%	NA	-
Atallah et al[17], 2014	20	243	NA	65%	4.5	-
Buchs et al[44], 2015	20	315.3	15%	30%	7	3 benign cases
de Lacy et al[18], 2013	20	234	0	20%	6.5	No readmission
Chouillard et al[29], 2014	16	265	6.25%	18.8%	10.4%	-
Wolthuis et al[43], 2014	14	148	18%	42.9%	8.8	No readmission
Knol et al[40], 2015	10	235	0	10%	6	-
Velthuis et al[42], 2013	5	175	0	40%	NA	-
Sylla et al[41], 2013	5	274.6	0	60%	5.2

BMI: Body mass index in kg/m²; ORT: Operative time in minutes; LOS: Length of stay in days; NA: Not available; TATA: Transabdominal-transanal.