Latest Advances in Intersphincteric Resection for Low Rectal Cancer

Table 2

Comparison of oncologic outcomes among OISR, LISR, and RISR.

	OISR	LISR	RISR
Tumour size (cm)	3.7 (1.6)	3.3 (1.7)	2.8 (1.8)
Lymph node retrieved	15.9 (9.8)	14.9 (9.1)	13.4 (7.7)
Proximal margin (cm)	15.6 (9.6)	18.7 (10.9)	20.7 (8.0)
Distal margin (cm)	1.7 (0.8)	1.7 (1.0)	1.4 (0.9)
Histopathological differentiation (%)
Well	14.0	17.9	23.8
Moderate	76.6	74.7	66.7
Poor	9.4	6.0	6.0
Other type	0	1.4	3.5
Stage (%)
pCR	0.5	2.0	6.0
I	35.4	36.0	39.3
II	26.4	27.6	23.8
III	34.9	30.6	23.8
IV	2.8	3.8	7.1
3-year LRR (%)	7.1	4.1	8.5
3-year DFS (%)	79.3	84.5	85.8
3-year OS (%)	84.5	89.3	94.2
5-year LRR (%)	2.0	6.6	8.7
5-year DFS (%)	71.0	76.3	80.6
5-year OS (%)	82.0	86.7	88.5

Values are mean (s.d.).
LRR: local recurrence rate; DFS: disease-free survival; OS: overall survival.