AUTHOR=Zhao Junmei , Wang Wentao , Yan Li , Chen Xi , Li Wen , Li Wanying , Chen Tingting , Chen Lunhua 

TITLE=Case report: A rare case of acute myeloid leukemia with CPSF6–RARG fusion resembling acute promyelocytic leukemia

JOURNAL=Frontiers in Oncology

VOLUME=12

YEAR=2022

URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2022.1011023

DOI=10.3389/fonc.2022.1011023

ISSN=2234-943X

ABSTRACT=<p><italic>Retinoic acid receptor gamma</italic> (<italic>RARG)</italic> gene rearrangement has been reported in several acute myeloid leukemia (AML) patients. They resemble classical acute promyelocytic leukemia (APL) patients in clinical features, morphology, and immunophenotype but do not carry the <italic>promyelocytic leukemia</italic> (<italic>PML</italic>)<italic>–RARA</italic> fusion gene. Importantly, almost all these APL-like AML patients show resistance to all-trans retinoic acid (ATRA), and no effective treatment is recommended for them. Here, we identified a case of AML resembling APL in clinical presentation and experimental findings carrying a rare cleavage and polyadenylation-specific factor 6 (CPSF6)-RARG fusion gene. The patient was insensitive to ATRA and ATO but responded well to homoharringtonine and cytarabine.</p>