. 2013 Nov 21;44(11):2000–2014. doi: 10.1007/s00595-013-0766-3

Table 2.

The frequency of lymph node metastasis and lymph vessel invasion in patients undergoing radical surgery for T1 colorectal cancer according to the initial treatment

References	Initial treatment	n	Node positive (%)	Lymph vessel invasion
Inoue et al. [67, 106]	Endoscopically	15	6.7	5.7 (n = 35^a)
Inoue et al. [67, 106]	Surgery	35	11.4	55.3 (n = 38^a)
Sawai et al. [68]	Endoscopically	31	0	9.7
Sawai et al. [68]	Surgery	51	9.8	49.0
Sakuragi et al. [39]	Local resection	147	4.5	NI
Sakuragi et al. [39]	Bowel resection	110	11.3	NI

NI not identified

^aBased on the histological findings after the initial treatment