Percutaneous cryosurgery for the treatment of hepatic colorectal metastases

Table 4 Survival based on patient characteristics and tumor features

	Median survival (mo)	Survival rate (%)
		1 yr	3 yr	5 yr
All patients	29	78	41	23
Tumor size
≤ 3 cmb	39	92	64	34
> 3 cm	21	70	41	21
Tumor number
< 3	38	81	40	20
> 3	40	78	41	22
Tumor location
Right lobeb	33	87	57	39
Left lobe	25	72	39	21
Bilobar	17	65	32	14
Detection of metastases
Synchronous	30	76	43	24
Metachronous	29	81	41	21
Metastases detected to cryosurgery
< 3 mo	31	74	41	22
> 3 mo	29	79	42	23
Pre-cryosurgery chemotherapy
Yes	30	75	40	24
No	29	77	41	21
Pre-cryosurgery CEA
< 100 ng/dLb	44	90	57	41
> 100 ng/dL	20	73	39	17
Cryosurgery procedure
Once	21	70	34	19
Twiceb	38	87	55	36
Thriceb	39	90	54	34
More	12	69	25	13
Post-cryosurgery TACE
Yesb	38	84	57	47
No	18	76	25	15

^bP < 0.01 Survival of patients with tumor size ≤ 3 cm vs > 3 cm, tumor location right lobe vs left lobe or bilobar, pre-cryosurgery CEA < 100 ng/dL vs > 100 ng/dL, twice or thrice procedures vs once or more procedures, and TACE vs no TACE after cryosurgery.