Long-term survival following radiofrequency ablation of colorectal liver metastases: A retrospective study

Table 1 Demography of patients who had colorectal liver metastases ablation therapy and lesions’ characteristics n (%)

Total number of patients (n): 49	No. of women: 17
Mean age: 65 yr	No. of men: 32
	No. of patients
Age distribution
≤ 50 yr	3 (6)
51-79 yr	44 (90)
≥ 80 yr	2 (4)
Total number of liver metastases ablated: 105
Average numbers of metastases per patient: 2.3
No. of liver metastases ablated
≤ 3	40 (82)
4-7	8 (16)
≥ 8	1 (2)
Maximum size of metastases ablated
Size of metastases
< 10 mm	3 (6.1)
11-30 mm	31 (63.3)
31-39 mm	6 (12.2)
≥ 40 mm	9 (18.4)

Table 2 Patients’ survival after application of strict selection criteria (n = 36, tumour size < 40 mm)

Years	1	2	3	4	5
% of patients alive	94	69	53	42	31

Table 3 Patients’ survival following ablation therapy compared with earlier studies in the literature

Year	Survival (%)
	Current study(n = 49)	Sørensen et al[8](n = 100)	Solbiati et al[6](n = 99)	Vogl et al[7](n = 603)
1	92	95	98	94
2	65	78	-	77
3	51	63	69.3	56
4	41	50	-	-
5	29	44	47.8	37