Trial Parameters
Brief Summary
This study is being done to determine if traces of tumor can be found in the blood before, during, and after patients stop treatment. We will analyze the tumor material to see if it is similar to tumor tissue and if the tumor material in blood is helpful in monitoring the disease.
Eligibility Criteria
Inclusion Criteria: * Newly diagnosed, relapsed, or refractory histologically confirmed high grade bone or soft tissue sarcoma or malignant renal, thyroid, germ cell, or hepatic tumors, OR * Healthy individual with no history of cancer or chronic medical problems and \< 21 years of age Exclusion Criteria: * CNS Malignancies * Individuals \< 6 months of age