PMID- 32992413 OWN - NLM STAT- MEDLINE DCOM- 20201005 LR - 20220531 IS - 0529-5807 (Print) IS - 0529-5807 (Linking) VI - 49 IP - 10 DP - 2020 Oct 8 TI - [Clinicopathological study of large B-cell lymphoma with IRF4 rearrangement]. PG - 1003-1008 LID - 10.3760/cma.j.cn112151-20200601-00433 [doi] AB - Objective: To study the clinicopathological features of large B-cell lymphoma (LBCL) with IRF4 rearrangement. Methods: Seven cases of LBCL with IRF4 rearrangement collected at the First Affiliated Hospital of Nanjing Medical University from November 2018 to October 2019 were evaluated by hematoxylin and eosin staining, immunohistochemistry and fluorescence in situ hybridization detection. The relevant literature was reviewed. Results: Four tumors were located in the tonsils, 2 tumors in the lymphoid nodes and one tumor in the adenoid.The patients were 3 males and 4 females patients with a median age of 24 years (range, 6 to 39 years).Microscopically, entirely follicular pattern was present in one case, entirely diffuse pattern in 2 cases, and follicular and diffuse pattern in other 4 cases. The tumor cells were medium to large in size and showed the morphology of centroblasts or blastoid cells with irregular nuclei, brisk mitotic activity in 3 cases and starry sky in 2 cases. All of the cases were positive for CD20, PAX-5, bcl-6, and MUM1 and had a Ki-67 index>80%, while CD10 and bcl-2 were positive in 3 cases. IRF4 gene rearrangement was identified in all cases and bcl-6 gene rearrangement in 2 cases. All patients presented with localized disease with clinical stage Ⅰ or Ⅱ, except one with stage Ⅳ at presentation and a new lesion in the mediastinum developed 8 months later. Conclusions: LBCL with IRF4 rearrangement is a clinicopathologically distinct entity. The observations reveal a broader spectrum of morphology and biological behaviors. The relationship between clinical stage and prognosis needs to be determined in more cases. FAU - Chen, W AU - Chen W AD - Department of Pathology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China. FAU - Gong, Q X AU - Gong QX AD - Department of Pathology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China. FAU - Li, X AU - Li X AD - Department of Pathology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China. FAU - Song, G X AU - Song GX AD - Department of Pathology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China. FAU - Wang, Z AU - Wang Z AD - Department of Pathology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China. FAU - Xu, W AU - Xu W AD - Department of Hematology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China. FAU - Zhang, Z H AU - Zhang ZH AD - Department of Pathology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China. LA - chi PT - Journal Article PL - China TA - Zhonghua Bing Li Xue Za Zhi JT - Zhonghua bing li xue za zhi = Chinese journal of pathology JID - 0005331 RN - 0 (Interferon Regulatory Factors) RN - 0 (interferon regulatory factor-4) SB - IM MH - Adolescent MH - Adult MH - Child MH - Female MH - Humans MH - Immunohistochemistry MH - In Situ Hybridization, Fluorescence MH - *Interferon Regulatory Factors/genetics MH - *Lymphoma, B-Cell MH - *Lymphoma, Follicular MH - *Lymphoma, Non-Hodgkin MH - Male MH - Young Adult OTO - NOTNLM OT - Immunohistochemistry OT - Lymphoma, B-cell OT - Pathology, molecular EDAT- 2020/09/30 06:00 MHDA- 2020/10/06 06:00 CRDT- 2020/09/29 22:50 PHST- 2020/09/29 22:50 [entrez] PHST- 2020/09/30 06:00 [pubmed] PHST- 2020/10/06 06:00 [medline] AID - 10.3760/cma.j.cn112151-20200601-00433 [doi] PST - ppublish SO - Zhonghua Bing Li Xue Za Zhi. 2020 Oct 8;49(10):1003-1008. doi: 10.3760/cma.j.cn112151-20200601-00433.