[Assessment of BIOMED-2 assays for detection of clonal Ig gene rearrangements in mature B-cell lymphomas].
OBJECTIVE
To evaluate the efficiency of the BIOMED-2 PCR assay and its implication in the diagnosis of mature B-cell non-Hodgkin's lymphomas.


METHODS
Clinical, morphological and immunohistochemical features of 72 cases of non-Hodgkin's lymphomas were studied, including 25 reactive lymphoid hyperplasia, 37 diffuse large B cell lymphomas (DLBCL) and 35 extranodal marginal zone lymphomas of mucosa associated lymphoid tissues (MALT lymphoma and in addition, 25 cases of reactive lymphoid hyperplasia were used as the controls). DNA was exacted from the paraffin embedded formalin fixed tissue blocks and the quality of DNA was assessed using the BIOMED-2 specimen control reaction. Adequate samples were then analyzed by BIOMED-2 for immunoglobulin heavy and kappa light chain rearrangements.


RESULTS
Adequate DNA was obtained in 83 of 97 samples, including 60 mature B cell lymphomas and 23 reactive lymphoid hyperplasia. Clonal B-cell gene rearrangements were detected in 57 of 60 (95%) lymphomas. In contrast, clonal Ig gene rearrangements were not detected in any of the 23 cases of reactive lymphoid hyperplasia.


CONCLUSIONS
BIOMED-2 assay is highly sensitive and specific for the detection of clonal B cell gene rearrangement using routine paraffin embedded formalin fixed specimens.
Zhang
Jing
J
Department of Pathology, Basic Medical College, Capital Medical University, Beijing 100069, China.
Wu
Ying-hui
YH
Kong
Hai-ying
HY
Zhou
Xiao-ge
XG
Jin
Ha-si
HS
Wu
Xiao-ming
XM
Zhang
Dan-dan
DD
Gong
Li-ping
LP
D018951:Antigens, CD20 / Q000378:metabolism; D051925:CD79 Antigens / Q000378:metabolism; D004273:DNA, Neoplasm / Q000235:genetics; D015322:Gene Rearrangement, B-Lymphocyte / Q000235:genetics*; D015326:Gene Rearrangement, B-Lymphocyte, Heavy Chain / Q000235:genetics; D015328:Gene Rearrangement, B-Lymphocyte, Light Chain / Q000235:genetics; D005803:Genes, Immunoglobulin; D006801:Humans; D016130:Immunophenotyping; D016393:Lymphoma, B-Cell / Q000235:genetics* / Q000276:immunology / Q000473:pathology; D018442:Lymphoma, B-Cell, Marginal Zone / Q000235:genetics / Q000276:immunology / Q000473:pathology; D016403:Lymphoma, Large B-Cell, Diffuse / Q000235:genetics* / Q000276:immunology / Q000473:pathology; D016612:Paraffin Embedding; D019310:Pseudolymphoma / Q000235:genetics / Q000276:immunology / Q000473:pathology; D012680:Sensitivity and Specificity
D018951:Antigens, CD20; D051925:CD79 Antigens; D004273:DNA, Neoplasm