TY - JOUR
T1 - Immunophenotypic and cytogenetic findings of B-lymphoblastic leukemia/lymphoma associated with combined IGH/BCL2 and MYC rearrangement
AU - Kelemen, Katalin
AU - Holden, Jaclyn
AU - Johnson, Laura J.
AU - Davion, Simone
AU - Robetorye, Ryan S.
N1 - Publisher Copyright:
© 2015 International Clinical Cytometry Society.
PY - 2017/7/1
Y1 - 2017/7/1
N2 - BACKGROUND: B-lymphoblastic leukemias (B-LBL) with combined IGH/BCL2 and MYC rearrangement are rare and their clinical, cytogenetic and immunophenotypic features are not well characterized. Here, we describe a case of a 61-year-old woman with B-LBL associated with these cytogenetic alterations and present a review of the literature of this disease.METHODS: Four-color flow cytometry (FC) was performed on a BD FACSCanto II flow cytometer. Data were analyzed with BD FACSDiva software. Cytogenetic, fluorescence in situ hybridization (FISH), and molecular studies were performed by conventional methods. A review of the literature was performed by a PubMed-assisted search.RESULTS: Including our case, eight B-LBLs associated with a documented "double-hit" karyotype (IGH/BCL2 and 8q24/MYC rearrangement) were identified in the literature (male/female 2/6, age 15-65). Three occurred de-novo, and five had a history of a CD10+ B-cell lymphoma. The typical immunophenotype was CD10, CD19, TdT positive, and negative for CD34 and surface immunoglobulin (Ig), established either by FC or immunohistochemistry. Seven cases were CD20-, and one case was CD20+. Translocation partners of MYC varied, and included IGH, lambda light chain, and an unknown gene on chromosome 9. Prognosis was poor with median survival of five months.CONCLUSIONS: Patients with B-LBL associated with a combined IGH/BCL2 and MYC rearrangement often have a history of a mature B-cell lymphoma. The immunophenotype of these cases is different from that of mature "double-hit" lymphomas; FC is essential to differentiate the B-LBL cases from the leukemic phase of mature B-cell lymphomas.
AB - BACKGROUND: B-lymphoblastic leukemias (B-LBL) with combined IGH/BCL2 and MYC rearrangement are rare and their clinical, cytogenetic and immunophenotypic features are not well characterized. Here, we describe a case of a 61-year-old woman with B-LBL associated with these cytogenetic alterations and present a review of the literature of this disease.METHODS: Four-color flow cytometry (FC) was performed on a BD FACSCanto II flow cytometer. Data were analyzed with BD FACSDiva software. Cytogenetic, fluorescence in situ hybridization (FISH), and molecular studies were performed by conventional methods. A review of the literature was performed by a PubMed-assisted search.RESULTS: Including our case, eight B-LBLs associated with a documented "double-hit" karyotype (IGH/BCL2 and 8q24/MYC rearrangement) were identified in the literature (male/female 2/6, age 15-65). Three occurred de-novo, and five had a history of a CD10+ B-cell lymphoma. The typical immunophenotype was CD10, CD19, TdT positive, and negative for CD34 and surface immunoglobulin (Ig), established either by FC or immunohistochemistry. Seven cases were CD20-, and one case was CD20+. Translocation partners of MYC varied, and included IGH, lambda light chain, and an unknown gene on chromosome 9. Prognosis was poor with median survival of five months.CONCLUSIONS: Patients with B-LBL associated with a combined IGH/BCL2 and MYC rearrangement often have a history of a mature B-cell lymphoma. The immunophenotype of these cases is different from that of mature "double-hit" lymphomas; FC is essential to differentiate the B-LBL cases from the leukemic phase of mature B-cell lymphomas.
KW - B-lymphoblastic leukemia/lymphoma
KW - IGH/BCL2 translocation
KW - MYC rearrangement
KW - immunophenotype
UR - http://www.scopus.com/inward/record.url?scp=85018922093&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85018922093&partnerID=8YFLogxK
U2 - 10.1002/cyto.b.21334
DO - 10.1002/cyto.b.21334
M3 - Article
C2 - 26517296
AN - SCOPUS:85018922093
SN - 1552-4949
VL - 92
SP - 310
EP - 314
JO - Cytometry. Part B, Clinical cytometry
JF - Cytometry. Part B, Clinical cytometry
IS - 4
ER -