Stopped: Funding unavailable
RATIONALE: Studying samples of blood from patients with cancer in the laboratory may help doctors predict whether patients undergoing donor stem cell transplant will develop acute graft-versus-host disease. PURPOSE: This clinical trial is studying T cells to see how well they help in predicting acute graft-versus-host disease in patients undergoing donor stem cell transplant.
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Percentage of regulatory T-lymphocytes (Tregs) at engraftment
Timeframe: day of stem cell transplant