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Fukuchi, Koichiro; Koyama, Daisuke; Takada, Maki; Mori, Hirotaka; Hayashi, Kiyohito; Asano, Naomi; Sato, Yuki; Fukatsu, Masahiko; Takano, Motoki; Takahashi, Hiroshi; Shirado-Harada, Kayo; Kimura, Satoshi; Yamamoto, Toshiyuki; Ikezoe, Takayuki
International journal of hematology, 10/2023, Letnik: 118, Številka: 4Journal Article
Blastic plasmacytoid dendritic cell neoplasm (BPDCN) is a rare and aggressive subtype of myeloid malignancy characterized by skin, lymph node and central nervous system (CNS) involvement. Although various regimens are used, a standard therapeutic strategy for BPDCN has not been established. Recent studies revealed that BPDCN patients frequently have a mutation in ZRSR2, which is a minor spliceosome component. However, the association between the clinical features of BPDCN and ZRSR2 mutational status remains unknown. A 70-year-old man was referred to our hospital with skin rash and enlarged lymph nodes, as well as blasts in the peripheral blood. BPDCN was diagnosed based on the immunophenotype of the blasts derived from bone marrow. Whole exome sequencing revealed that BPDCN cells collected at diagnosis had mutations in ZRSR2, ZBTB33, CUL3, TET2 and NRAS. RNA sequencing analysis indicated that U12-type intron retention occurred in LZTR1, caused by ZRSR2 loss. After seven cycles of venetoclax combined with azacitidine therapy, BPDCN cells appeared in the peripheral blood and infiltrated the CNS. Two KRAS mutated clones appeared at BPDCN recurrence. These findings are important for understanding the pathogenesis of BPDCN, which will inform development of novel therapeutic strategies.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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