Table 2 Results of multi-centre studies of the SLN procedure in colon cancer

Study	Number of patients	Number of centres	Identification rate (%)	Accuracy (%)	Sensitivity (%)	Upstaging (%)
Bilchik et al. [15]	40	3	100	100	100	10
Saha et al. [18]	131	3	99	97	92	16
Bertagnolli et al. [14]	72	13	92	81	42	0
Read et al. [21]	38	2	79	76	25	3
Kelder and Braat	69	6	97	96	89	13 or 18