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This study has not yet been registered on ClinicalTrials.gov, which is currently a pre-requisite for display of detailed eligibility criteria.

• If you need assistance with ClinicalTrials.gov registration for an oncology study, please contact the Jonsson Comprehensive Cancer Center's Office of Regulatory Compliance.
• If you need assistance with ClinicalTrials.gov registration for a non-oncology study, please contact the Office of Regulatory Affairs.

This study has not yet been registered on ClinicalTrials.gov, which is currently a pre-requisite for display of detailed eligibility criteria.

• If you need assistance with ClinicalTrials.gov registration for an oncology study, please contact the Jonsson Comprehensive Cancer Center's Office of Regulatory Compliance.
• If you need assistance with ClinicalTrials.gov registration for a non-oncology study, please contact the Office of Regulatory Affairs.

This study has not yet been registered on ClinicalTrials.gov, which is currently a pre-requisite for display of detailed eligibility criteria.

• If you need assistance with ClinicalTrials.gov registration for an oncology study, please contact the Jonsson Comprehensive Cancer Center's Office of Regulatory Compliance.
• If you need assistance with ClinicalTrials.gov registration for a non-oncology study, please contact the Office of Regulatory Affairs.

This study has not yet been registered on ClinicalTrials.gov, which is currently a pre-requisite for display of detailed eligibility criteria.

• If you need assistance with ClinicalTrials.gov registration for an oncology study, please contact the Jonsson Comprehensive Cancer Center's Office of Regulatory Compliance.
• If you need assistance with ClinicalTrials.gov registration for a non-oncology study, please contact the Office of Regulatory Affairs.

This study has not yet been registered on ClinicalTrials.gov, which is currently a pre-requisite for display of detailed eligibility criteria.

• If you need assistance with ClinicalTrials.gov registration for an oncology study, please contact the Jonsson Comprehensive Cancer Center's Office of Regulatory Compliance.
• If you need assistance with ClinicalTrials.gov registration for a non-oncology study, please contact the Office of Regulatory Affairs.

Spinocerebellar ataxias (SCA) are genetic neurological diseases that cause imbalance, poor coordination, and speech difficulties. There are different kinds of SCA and this study will focus on types 1, 2,3, and 6 (SCA 1, SCA 2, SCA 3 , also known as Machado-Joseph disease and SCA 6). The diseases are rare, slowly progressive, cause increasingly severe neurological difficulties and are variable across and within genotypes. The purpose of this research study is to bring together a group of experts in the field of SCA for the purpose of learning more about the disease.

The research questions are:

• How does your disease progress over time?
• What are the best ways to measure the progression?
• Do some genes, other than the gene that is abnormal in your disease, have any effect on the way the disease behaves?

This is a nationwide study and we expect that 800 patients will participate all over the USA. The participants will be in the study for an indeterminate period of time. Study visits will be done every 6 or 12 months depending on the participating site.

This study has not yet been registered on ClinicalTrials.gov, which is currently a pre-requisite for display of detailed eligibility criteria.

• If you need assistance with ClinicalTrials.gov registration for an oncology study, please contact the Jonsson Comprehensive Cancer Center's Office of Regulatory Compliance.
• If you need assistance with ClinicalTrials.gov registration for a non-oncology study, please contact the Office of Regulatory Affairs.

This study has not yet been registered on ClinicalTrials.gov, which is currently a pre-requisite for display of detailed eligibility criteria.

• If you need assistance with ClinicalTrials.gov registration for an oncology study, please contact the Jonsson Comprehensive Cancer Center's Office of Regulatory Compliance.
• If you need assistance with ClinicalTrials.gov registration for a non-oncology study, please contact the Office of Regulatory Affairs.

This study has not yet been registered on ClinicalTrials.gov, which is currently a pre-requisite for display of detailed eligibility criteria.

• If you need assistance with ClinicalTrials.gov registration for an oncology study, please contact the Jonsson Comprehensive Cancer Center's Office of Regulatory Compliance.
• If you need assistance with ClinicalTrials.gov registration for a non-oncology study, please contact the Office of Regulatory Affairs.

This study has not yet been registered on ClinicalTrials.gov, which is currently a pre-requisite for display of detailed eligibility criteria.

• If you need assistance with ClinicalTrials.gov registration for an oncology study, please contact the Jonsson Comprehensive Cancer Center's Office of Regulatory Compliance.
• If you need assistance with ClinicalTrials.gov registration for a non-oncology study, please contact the Office of Regulatory Affairs.

This study has not yet been registered on ClinicalTrials.gov, which is currently a pre-requisite for display of detailed eligibility criteria.

• If you need assistance with ClinicalTrials.gov registration for an oncology study, please contact the Jonsson Comprehensive Cancer Center's Office of Regulatory Compliance.
• If you need assistance with ClinicalTrials.gov registration for a non-oncology study, please contact the Office of Regulatory Affairs.

This study has not yet been registered on ClinicalTrials.gov, which is currently a pre-requisite for display of detailed eligibility criteria.

• If you need assistance with ClinicalTrials.gov registration for an oncology study, please contact the Jonsson Comprehensive Cancer Center's Office of Regulatory Compliance.
• If you need assistance with ClinicalTrials.gov registration for a non-oncology study, please contact the Office of Regulatory Affairs.

This study has not yet been registered on ClinicalTrials.gov, which is currently a pre-requisite for display of detailed eligibility criteria.

• If you need assistance with ClinicalTrials.gov registration for an oncology study, please contact the Jonsson Comprehensive Cancer Center's Office of Regulatory Compliance.
• If you need assistance with ClinicalTrials.gov registration for a non-oncology study, please contact the Office of Regulatory Affairs.

This clinical trial keeps track of and collects follow-up information from patients who are currently enrolled on or have participated in a Children's Oncology Group study. Developing a way to keep track of patients who have participated in Children's Oncology Group studies may allow doctors learn more about the long-term effects of cancer treatment and help them reduce problems related to treatment and improve patient quality of life.

This research trial studies kidney tumors in younger patients. Collecting and storing samples of tumor tissue, blood, and urine from patients with cancer to study in the laboratory may help doctors learn more about changes that occur in deoxyribonucleic acid (DNA) and identify biomarkers related to cancer.

This research trial studies biomarkers in tumor tissue samples from patients with newly diagnosed neuroblastoma or ganglioneuroblastoma. Studying samples of tumor tissue from patients with cancer in the laboratory may help doctors identify and learn more about biomarkers related to cancer.

This clinical trial studies cancer survivors to identify those who are at increased risk of developing late-occurring complications after undergoing treatment for childhood cancer. A patient's genes may affect the risk of developing complications, such as congestive heart failure, avascular necrosis, stroke, and second cancer, years after undergoing cancer treatment. Genetic studies may help doctors identify survivors of childhood cancer who are more likely to develop late complications.