Tumor micrometastases in mesorectal lymph nodes and their clinical significance in patients with rectal caner

Table 1 Size of lymph nodes (LNs) and status of tumor metastases and micrometastases

Size of LNs (mm)	No. of LNs				Positive ratio (%)
	Total	HE-positive	IHC-positive	Sum of positive
≤ 2	92	4	3	7	7.6b
2-5	274	56	28	84	30.7
≥ 5	182	54	8	62	34.1d
Total	548	114	39	153	27.9

^bP < 0.01, vs 2-5;

^dP < 0.01, vs ≤ 2.