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MYC, BCL2, and BCL6 rearrangements in primary central nervous system lymphoma of large B cell type

  • Anahita Nosrati
  • Ahmad Monabati
  • Alireza Sadeghipour
  • Fatemeh Radmanesh
  • Akbar Safaei
  • Sajjadeh Movahedinia
Original Article

Abstract

Primary central nervous system lymphoma (PCNSL) is a rare specific subtype of non-Hodgkin lymphoma limited to the brain, leptomeninges, spinal cord, or eyes without any systemic presentation and relapse which mostly takes place in CNS. In more than 95% of patients, it is of diffuse large B cell lymphoma (DLBCL) type. Categorizing PCNSL to germinal center cell like or activated B cell like, as we usually do for DLBCL NOS, may not be applicable for predicting outcome. Possible prognostic significance of MYC, BCL2, and/or BCL6 rearrangements may be important given what we know about their impact in systemic DLBCL, but we have limited knowledge about the status of double or triple hit molecular changes in PCNSL. Here, we have investigated prevalence of these molecular alterations in PCNSL. Two independent tissue microarrays constructed from 78 formalin-fixed paraffin-embedded blocks of confirmed PCNSL were tested for rearrangement of MYC, BCL2, and BCL6 by interphase fluorescent in situ hybridization (FISH) using break apart dual color probes. BCL6 translocation was detected in 15 (12%) cases. Translocation involving MYC and BCL2 was identified in 3 cases (3.8%) and 1 case (1.3%) respectively. One double hit lymphoma was discovered with both MYC/BCL2 translocation (1.3%). To the best of our knowledge, few organized studies have been conducted for MYC, BCL2, and/or BCL6 rearrangement in PCNSL. This study is evaluating large number of PCNSL. Double or triple hit events which are rarely seen in PCNSL.

Keywords

Primary central nervous system lymphoma MYC BCL2 BCL6 Rearrangement 

Notes

Authors’ contribution

Anahita Nosrati participated in assessing FISH cases, drafting, proofreading, and finally writing of the manuscript. Ahmad Monabati and Akbar Safaei both participated in final assessing of all FISH cases and are essentially responsible for writing of manuscript and submission. Alireza Sadeghipour participated in introducing and preparing the clinical data of patients. Fatemeh Radmanesh and Sajjadeh Movahedinia, both participated in introducing clinical data of patients. All authors critically revised and approved the manuscript.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Anahita Nosrati
    • 1
  • Ahmad Monabati
    • 2
  • Alireza Sadeghipour
    • 3
  • Fatemeh Radmanesh
    • 4
  • Akbar Safaei
    • 5
  • Sajjadeh Movahedinia
    • 6
    • 7
  1. 1.Hematopatholgy Service, Department of Pathology, School of MedicineShiraz University of Medical SciencesShirazIran
  2. 2.Hematopatholgy Service, Department of Pathology and Hematology Research Center, School of MedicineShiraz University of Medical SciencesShirazIran
  3. 3.Department of Pathology, Rasool-Akram HospitalIran University of Medical SciencesTehranIran
  4. 4.Department of PathologyShiraz University of Medical SciencesShirazIran
  5. 5.Molecular Pathology and Cytogenetics, Department of PathologyShiraz University of Medical SciencesShirazIran
  6. 6.Pathology and Stem Cell Research Center, Afzalipour Medical SchoolKerman University of Medical SciencesKermanIran
  7. 7.Oncopathology Research CenterIran University of Medical SciencesTehranIran

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