Table 2.

Correlation among timing of blood sample collection and circulating tumor cell status and postoperative recurrence

Group	Preoperation (baseline)	Perioperation (within 12 hours after surgery)	Postoperation (90 days after surgery)	Number of patients	Patient number of recurrence (%)
1.	Positive	Positive	Positive	9	8（88.9）
2.	Positive	Positive	Negative	3	2（66.7）
3.	Positive	Negative	Positive	2	0（100）
4.	Positive	Negative	Negative	8	0（0）
5.	Negative	Positive	Positive	5	4（80）
6.	Negative	Positive	Negative	7	0（0）
7.	Negative	Negative	Positive	3	3（100）
8.	Negative	Negative	Negative	44	17（38.6）
Overall	Negative			81	36（44.4）