Abstract
Background: Although the analysis of molecular clonality rearrangements of the immunoglobulin light chains (IGK and IGL) is an alternative approach for diagnosis of B cell non-Hodgkin lymphomas (NHLs) using BIOMED-2 protocols, NHLs have not been extensively confirmed for Hodgkin lymphoma (HL) cases. We evaluated BIOMED-2 protocols in HL cases, which have been suggested previously as gold standard method for molecular clonality analysis on formalin fixed, paraffin-embedded (FFPE) tissue in NHL patients.Methods: We recruited 50 consecutive FFPE tissues of HL samples to evaluate IGK and IGL clonality gene rearrangements using BIOMED-2 and Heteroduplex methods.Results: Our findings revealed a total of 94% (47/50) positive clonality, which consisted of 70% (35/50) for IGK and 44% (22/50) for IGL. In three cases, clonality was not detected in any of the immunoglobulin gene segments.Conclusions: Analysis of clonality gene rearrangements in IGK and IGL genes using BIOMED-2 protocols could be implemented as a valuable method for improving clonality detection rate in HL cases and sensitivity (94%) and accuracy of HL diagnosis similar to that of the NHL samples will be increased.
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