Study Status: Completed
Recruit Status: Completed
Study Type: Observational
Official Title: TCR Vbeta Repertoire and PNH Clones in Children With Refractory Cytopenia (RC). An Open Nonrandomised Multi-Center Prospective Study
Brief Summary:
RATIONALE: Studying biopsy, bone marrow, and blood samples from patients with cytopenia that did not respond to treatment may help doctors learn more about the disease and plan the best treatment.
PURPOSE: This laboratory study is assessing immune function in young patients with cytopenia that did not respond to treatment.