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Genomic aberrations involving 12p/ETV6 are highly prevalent in blastic plasmacytoid dendritic cell neoplasms and might represent early clonal events.

Abstract：

BACKGROUND:Chromosomal aberrations at the ETV6 gene locus on 12p13.2 are common in bone marrow samples involved by blastic plasmacytoid dendritic cell neoplasm (BPDCN). However, their pathogenic role, incidence in cutaneous BPDCN lesions, and clinical significance have not been assessed systematically. RESULTS:The study group included 30 BPDCN patients, 25 men and 5 women, with a median age of 64 years. Conventional cytogenetic analysis demonstrated karyotypic aberrancies in 15 cases, of which 8 had chromosomal lesions involving 12p. In addition, 2 cases with normal diploid karyotype had cryptic 12p/ETV6 deletion by ETV6 FISH test. Notably, 2 bone marrow samples with ETV6 rearrangement had no detectable BPDCN involvement, but otherwise dynamic changes in the detection of 12p/ETV6 aberrations correlated with the presence of morphologically and/or immunophenotypically detectable disease. Tissue specimens from 6 patients with cutaneous BPDCN all tested positive for homozygous or heterozygous ETV6 deletions. CONCLUSION:We demonstrate that monoallelic and biallelic 12p/ETV6 deletions are highly prevalent in BPDCN, and their detection is enhanced by the use of FISH and aCGH. In addition, 12p/ETV6 may be present in the bone marrow of BPDCN patients in the absence of detectable disease suggesting that such alterations might represent an early pathogenic event.

journal_name

Leuk Res

journal_title

Leukemia research

authors

Tang Z,Li Y,Wang W,Yin CC,Tang G,Aung PP,Hu S,Lu X,Toruner GA,Medeiros LJ,Khoury JD

doi

10.1016/j.leukres.2018.09.006

subject

Has Abstract

pub_date

2018-10-01 00:00:00

pages

86-94

eissn

0145-2126

issn

1873-5835

pii

S0145-2126(18)30212-1

journal_volume

73

pub_type

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