To investigate the outcome of radiofrequency ablation (RFA) in treatment for liver cancer located in the second hepatic portal.

Objective Study the short period treatment of Hepatocellular carcinoma (HCC) by clustered electrode of radio frequence (RF) system.

Objective to investigate the efficacy of radiofrequency (RF) ablation comparing with percutaneous ethanol injection (PEI) in the treatment of postoperative recurrent hepatocellular carcinoma.