3. Correspondence of six molecular markers between primary tumor (T) and metastatic lymph nodes (N) in evaluable cases of lymph node metastasis.

Markers	Cases	n (%)					n/N (%)*
		T(+)N(+)	T(+)N(−)	T(−)N(+)	T(−)N(−)		N(+)/T(+)
CEA, carcinoembryonic antigen; EpCAM, epithelial cell adhesion molecule; *, the proportion of metastatic lymph nodes positive in the primary tumors positive.
CEA	47	25 (53.2)	10 (21.3)	7 (14.9)	5 (10.6)		25/35 (71.4)
E-cadherin	47	46 (97.9)	0 (0)	0 (0)	1 (2.1)		46/46 (100)
EpCAM	52	51 (98.1)	1 (1.9)	0 (0)	0 (0)		51/52 (98.1)
P-cadherin	47	36 (76.6)	7 (14.9)	3 (6.4)	1 (2.1)		36/43 (83.7)
CD44v6	43	0 (0)	5 (11.6)	0 (0)	38 (88.4)		0/5 (0)
c-erbB2	44	3 (6.8)	1 (2.3)	3 (6.8)	37 (84.1)		3/4 (75.0)