Table 2. Types of ablation before and during the observation.

Percutaneous Ablation	Before observation	During observation	Total
RF	37	14	51
PEI	6	9	15
MW	4	9	11
RF + PEI	2	3	5
MW + RF + PEI	1	0	1
RF + MW	1	2	3
MW + PEI	0	1	1
Total	51	38	89

RF = radiofrequency; PEI = percutaneous ethanol injection; MW = microwave