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

This study is testing the effectiveness and safety of microwave ablation (a procedure using focused heat) to destroy liver tumors — either primary liver cancer or cancer that has spread to the liver from elsewhere — using a specific device called the Starwave microwave generator. **You may be eligible if...** - You have a suspected or confirmed liver tumor (hepatocellular carcinoma or metastatic liver cancer) that is 4 cm or smaller - Your liver function is adequate (Child-Pugh Class A or B) - You have had a recent scan (CT, MRI, or ultrasound) confirming the tumor within the past 60 days **You may NOT be eligible if...** - You have 3 or more malignant liver tumors - Your tumor is larger than 4 cm - Your tumor has poorly defined borders (diffuse type) - Your tumor is very close (within 5 mm) to major blood vessels or bile ducts - You have severely impaired liver function (Child-Pugh Class C) - You have cancer that has invaded blood vessels - You have severe blood clotting problems - You have multiple tumors outside the liver as well Talk to your doctor to see if this trial is right for you.