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.
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Percentage of patients enrolled
Timeframe: Up to 20 years
Percentage of patients in which long-term (20+ years) contact is maintained
Timeframe: Up to 20 years
Percentage of eligible patients located who were lost to follow-up
Timeframe: Up to 20 years
Percentage of located patients enrolled
Timeframe: Up to 20 years
Collection of protocol-specific outcome data
Timeframe: Up to 20 years
Collection of cumulative therapeutic exposure data
Timeframe: Up to 20 years