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Primary nodal Epstein-Barr virus-positive T-cell/NK-cell lymphoma: Real-world experience.
Acta Haematologica 2024 March 4
PTCL-EBV is a disease entity newly recognized in the WHO-HAEMS5 and the ICC of Mature Lymphoid neoplasms classification. Previously, it was classified as a subtype within PTCL-NOS and was known to have a poor prognosis. However, the clinical feature and treatment outcomes are not well known. This retrospective observational study was conducted on patients diagnosed with PTCL-EBV at Samsung Medical Center through a pathology review from 2000 to 2020. We analyzed clinical data from 14 patients. We conducted an investigation of patients with PTCL-EBV into immunohistochemistry and analysis of survival outcomes for each treatment regimen. We analyzed both overall survival and progression-free survival for each treatment regimen. 25% were beta-F1 positive, and 67% were TCRγ positive. TIA-1 and granzyme B exhibited positive results in all cases, whereas the NK cell marker CD56 was negative in only 11% of patients. The CD3 was observed in all of patients. And, the CD4 was 43% positive. The CD8 were investigated in 8 patients, with 37.5% positive. Hepatosplenomegaly was observed in 55% of patients, and 70% of patients displayed B symptoms at the time of diagnosis. Patients who received CHOP or CVP treatment had a median PFS of 2.2 months (95% CI 1.9-2.5 months), and patients who received other treatments had a median PFS of 5.1 months (NA). The objective response rate (ORR) for ICE/dexa as the first or second line treatment was 100% (3 out of 3). But, ORR of CHOP or CVP as the first line treatment was 33.3% (3 out of 9). The median overall survival (OS) for the group that received HSCT after achieving a response was 34.6 months (95% CI 0-74.6 months), and the median OS for the group that did not receive HSCT was 5.0 months (95% CI 2.1-7.9 months) (p=0.04). In conclusion, in the context of PTCL-EBV, despite a limited sample size, the ICE/Dexa regimen shows potential benefits in terms of ORR and PFS. Furthermore, the application of HSCT following the attainment of a complete response may prove advantageous.
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