AUTHOR=Chen Chao , Zhang Wei , Zhou Daobin , Zhang Yan TITLE=Sintilimab and Chidamide for Refractory Transformed Diffuse Large B Cell Lymphoma: A Case Report and A Literature Review JOURNAL=Frontiers in Oncology VOLUME=Volume 11 - 2021 YEAR=2021 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2021.757403 DOI=10.3389/fonc.2021.757403 ISSN=2234-943X ABSTRACT=Relapsed/refractory (R/R) transformed diffused large B cell lymphoma (tDLBCL) has a poor prognosis, studies about new therapies for tDLBCL are scarce. PD-1 antibody and histone deacetylase inhibitor both have anti-lymphoma effects but the combination of these two therapies hasn’t been explored in DLBCL. Here, we present a successful combination therapy of sintilimab and chidamide for R/R tDLBCL. The patient was a 71-year-old man with pulmonary mucosa-associated lymphoid tissue lymphoma. He didn’t receive any treatment until transformed DLBCL was confirmed 2 years later. The tDLBCL was primary refractory to R2-CHOP, R2-MTX, and Gemox regimens. However, he achieved sustained complete remission after the combination therapy of sintilimab and chidamide. According to our knowledge, this is the first report of sintilimab combined with chidamide for treatment of R/R tDLBCL, which opens up new therapeutic possibilities of this new combination therapy in future prospective clinical trials.