Clinical Effectiveness of Microwave Ablation Using Starwave Microwave Generator for Hepatic Malignancies

Inclusion Criteria: * Child-Pugh Class A or B * Patients with suspected hepatocellular carcinoma or residual/recurrent hepatocellular carcinoma of 4 cm or less on MDCT, CEUS, or MRI performed within the last 60 days or Patients with suspected metastatic liver cancer of 4 cm or less on MDCT, CEUS, or MRI performed within the last 60 days, for whom microwave thermal ablation is being considered Exclusion Criteria: * In cases where there are three or more malignant liver tumors * When the maximum size of the tumor exceeds 4 cm * Diffuse infiltrative type of cancer with unclear tumor boundaries * When the tumor is adhered to the central hepatic portal vein, hepatic vein, or bile duct by 5 mm or more * Severe liver failure (Child-Pugh Class C) * In cases of vascular invasion by malignant liver tumors * Severe coagulopathy (platelet count below 50,000/mm³ or INR prolonged by more than 50%) * In cases of multiple extrahepatic metastases * Situations where it is highly unlikely to obtain appropriate data for research purposes