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Chen X, Rui WW, Bi K, Wu YJ, Zhang SX, Zhang L, Yu J, Xiu B, Yi XH, Zeng Y. [A study of LEF1 protein expression in diagnosis and differential diagnosis of lymphoblastic lymphoma/acute lymphoblastic leukemia]. Zhonghua Bing Li Xue Za Zhi 2021; 50:207-212. [PMID: 33677883 DOI: 10.3760/cma.j.cn112151-20200513-00379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the expression of LEF1 protein in lymphoblastic lymphoma/acute lymphoblastic leukemia (LBL/ALL) and small B-cell lymphomas, and its value in pathologic diagnosis and differential diagnosis of LBL/ALL. Methods: 53 cases of LBL/ALL were collected at shanghai Tongji Hospital from January 2012 to December 2019. The protein expression of LEF1 and TdT was detected by immunohistochemistry in 53 paraffin-embedded tissue samples of LBL/ALL. The specificity and sensitivity of LEF1 and TdT in the diagnosis of LBL/ALL were compared. The expression of LEF1 protein in 77 cases of small B-cell lymphomas including chronic lymphocytic leukemia/small lymphoid lymphoma (CLL/SLL), follicular lymphoma, mantle cell lymphoma, marginal zone lymphoma and Waldenstrom's macroglobulinemia/lymphoplasmacytic lymphoma was studied. The correlation between LEF1 expression and overall survival (OS) and progression-free survival (PFS) was performed by univariate analysis. Results: The expression of LEF1 in LBL/ALL was 100% (53/53), the median value was 90%; the expression of TdT was 84.9% (T-LBL/ALL 78.1%, B-LBL/ALL 95.2%), the median value was 80%; the expression rate and median value of LEF1 and TdT were significantly different (P=0.008 and 0.001 respectively). The expression of LEF1 in CLL/SLL was 14/18, the median value was 45%; LEF1 was not expressed in follicular lymphoma (0/16), mantle cell lymphoma (0/16), marginal zone lymphoma (0/19), and Waldenstrom's macroglobulinemia/lymphoplasmacytic lymphoma (0/8). LEF1 expression was significantly different between B-LBL/ALL and small B-cell lymphomas. The median follow-up time of LBL/ALL cases in this group was 16 months. There was no statistical difference between LEF1 expression and the OS and PFS in LBL/ALL patients. Conclusions: Immunohistochemical staining of LEF1 has high sensitivity and good specificity in the diagnosis of LBL/ALL, and its combination with TdT can improve the diagnostic rate of LBL/ALL.
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Affiliation(s)
- X Chen
- Department of Pathology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China
| | - W W Rui
- Department of Pathology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200010, China
| | - K Bi
- Department of Pathology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China
| | - Y J Wu
- Department of Pathology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China
| | - S X Zhang
- Department of Pathology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China
| | - L Zhang
- Department of Pathology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China
| | - J Yu
- Department of Pathology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China
| | - B Xiu
- Department of Hematology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China
| | - X H Yi
- Department of Pathology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China
| | - Y Zeng
- Department of Pathology, Tongji Hospital, Tongji University School of Medicine, Shanghai 200065, China
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