Relapsed and Refractory Hepatoblastoma: A Prospective Registry and Liver Tumor Research Consortium Initiative

This study is creating a registry of children and young patients with relapsed or hard-to-treat hepatoblastoma (a rare type of liver cancer in children) to better understand the disease and help develop new treatment options. It also collects tumor tissue to build models for future research. **You may be eligible if:** - You have a suspected or confirmed diagnosis of relapsed or refractory hepatoblastoma - You were under 6 years old when first diagnosed (for a related liver cancer type) - You, a parent, or legal guardian can provide written consent **You may NOT be eligible if:** - There are no formal exclusion criteria for this registry study Talk to your doctor to see if this trial is right for you.