Blood neoplasia · 2024
Outcomes for high-risk defining events in follicular lymphoma following frontline immunochemotherapy.
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Tobin Joshua W D, Chikatamarla Venkata A, Matic Marko, Griffin Alison, Chowdhury Rakin, Salvaris Ross, Goh Amanda, Black Harrison, Tong Tsz Hung, Birks Callum, Jain Sanjiv, Goodall Elizabeth, Sirdesai Shreerang, Trevis Thomas, Steinepreis Elizabeth, Chen Yiyang, Li Li, Broadby Glenn, Gutta Naadir, Morris Kirk, Cochrane Tara, Trotman Judith, Talaulikar Dipti, Shortt Jake, Hodges Georgina, Hawkes Eliza A, Cheah Chan Y, Barraclough Allison, Manos Kate, Johnston Anna, Royle Jane, Mondello Patrizia, Ansell Stephen M, Hapgood Greg
Аннотация
Progression of follicular lymphoma (FL) or transformation (TFL) within 24 months of immunochemotherapy (ICT) represent high-risk defining events (HRDE) with poor overall survival (OS). We examined baseline clinical characteristics, imaging, and outcomes for patients experiencing HRDE with newly diagnosed FL requiring ICT. HRDE groups were: relapse or progression of FL within 24 months (FL24), early TFL (transformation <24 months of ICT), late TFL (transformation >24 months of ICT).433 patients were categorized as reference FL (Ref FL), n = 352 (no HRDE); FL24, n = 43; early TFL, n = 29; late TFL, n = 9. Chemotherapy included bendamustine (63%), CHOP (cyclophosphamide, vincristine, doxorubicin, prednisone) (27%), or CVP (cyclophosphamide, vincristine, prednisone) (10%); 85% received rituximab/15% obinutuzumab and 48% received maintenance therapy. Compared with Ref FL group, OS from HRDE was inferior for FL24 (hazard ratio [HR], 3.93; 95% confidence interval [CI], 2.14-7.23), early TFL (HR, 8.16; 95% CI, 4.38-15.2), and late TFL (HR, 8.23; 95% CI, 3.18-21.25). OS from HRDE was inferior for early TFL compared with FL24 (HR, 2.08; 95% CI, 1.02-4.21). In multivariable analysis, performance status, lactate dehydrogenase, beta-2-microglobulin and grade 3A were associated with early TFL. Clinical characteristics did not differentiate early TFL from FL24. Maximum standardized uptake value was higher in early TFL but not FL24 compared to Ref FL. Early TFL and FL24 represent different HRDEs and are associated with inferior OS. Distinguishing early TFL from FL24 is important for biomarker development, management and to develop and interpret trials in this area of unmet need.