Abstract
Approximately 15% of all cases of childhood classical Hodgkin's disease (HD) express CD20, a B-cell marker associated with immunoglobulin heavy chain rearrangements. Immunoglobulin heavy chain rearrangements in Reed-Sternberg cells could be used to assess minimal residual disease (MRD), as was shown with immunoglobulin heavy chain patient-specific primers (PSPs) in non- Hodgkin's lymphoma. The aim of this study was to analyze pediatric HD for future design of immunoglobulin heavy chain PSP for MRD detection. DNA was extracted from paraffin-embedded tissue from unstained slides of 8 pediatric CD20+ nodular sclerosis HD cases and 10 CD20− nodular sclerosis HD cases. Immunoglobulin heavy chain polymerase chain reaction and sequencing were performed on 16 of 18 cases, which had adequate DNA for further analysis. Sequence analysis from 3 cases (19% of HD cases) demonstrated unique V(D)J regions, which could potentially be used to design PSP. Unique PSPs could be used to assess MRD in advanced-stage HD specimens. Future studies should focus on improved detection and analysis of more cases to identify appropriate specimens in assessing clinical implications of MRD detection.
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