COG cancer researchers are trying to better understand the causes of Hepatoblastoma. They want to develop improved methods for treatment, diagnosis and possibly even prevention. The exact molecules or genes to be studied will change over time as progress in cancer research is made. Not every gene or molecule known to be involved in cancer will be studied. Researchers will choose to study only those genes or molecules which they think are most promising. At present, the study of at least three genes is planned.