Outcomes in peripheral T-cell lymphomas: An analysis of patients treated at a single academic institution.

e19524 Background: T-cell lymphomas are a heterogeneous group of lymphomas, including the cutaneous T cell lymphoma (CTCL) and the peripheral T cell lymphomas (PTCL). Regarding the PTCL, it’s a heterogeneous group including approximately 23 different diseases with the peripheral T-cell lymphoma not otherwise specified (PTCL NOS), angioimmunoblastic lymphoma (AITL), and anaplastic large cell lymphoma (ALCL) being the most frequent subtypes. In contrast with the B cell lymphomas, most of the PTCL have a worse prognosis. We aim in our study to quantify the prognosis in each of the most frequent subtypes of PTCL. Methods: We analyzed patients with either PTCL NOS, AITL, or ALCL treated at Sylvester Comprehensive Cancer Center between 2010 and 2020. We calculated overall survival (OS) using the Kaplan-Meier method with Log-Rank Test to estimate the 95% confidence interval. Results: 98 patients belonged to 1 of the 3 major T-cell lymphoma subtypes: 43 to PTCL NOS, 33 to AITL, and 20 to ALCL, being 7 ALK-positive and 13 ALK-negative. Mean age in PTCL NOS, AITL and ALCL was 56 years (ranging from 8-88), 62 (8-89), and 52 (1-79), respectively. In PTCL NOS, AITL and ALCL respectively, 21 (46%), 15 (45%) and 7 (35%) of patients were female. The three-year and five-year overall survival was 62% (95% CI 42-82) and 30% (95% CI 6-54%) in PTCL NOS, 64% (95% CI 44-84) and 42% (95% CI 4-78%) in AITL, 75 (95% CI 51-99) and 67% (95% CI 33-100) in ALK-negative ALCL. There were no reported deaths in ALK-positive ALCL. The mean survival was lowest in PTCL NOS (p = 0.02), being 3,6 years, while AITL it is 5.2 and in ALCL it is 8.4. Conclusions: Amongst the three major subtypes of PTCL, PTCL NOS have the worse prognosis. Future research is needed to develop a risk stratification tool in each subtype.