Patients with advanced-stage Hodgkin lymphoma (HL) receiving intensive treatment with escalated BEACOPP (bleomycin, etoposide, doxorubicin, cyclophosphamide, vincristine, procarbazine, prednisone) (eBEACOPP) have excellent outcomes [1, 2]. However, late effects such as second primary malignancies (SPM) and infertility represent ongoing concerns [3, 4]. Novel approaches using an eBEACOPP backbone, therefore, aim at reducing toxicity without compromising efficacy. The BrECAPP (brentuximab vedotin, etoposide, cyclophosphamide, doxorubicin, procarbazine, prednisone) and BrECADD (brentuximab vedotin, etoposide, cyclophosphamide, doxorubicin, dacarbazine, dexamethasone) protocols were investigated in a randomized phase II study including patients with newly diagnosed advanced-stage classical HL (cHL). Both regimens combine eBEACOPP-based chemotherapy with the CD30-directed antibody-drug conjugate brentuximab vedotin (BV). Response rates were similar to standard eBEACOPP and especially the BrECADD protocol was associated with reduced acute toxicity [5].
The major objectives of the present follow-up analysis of the study were progression-free survival (PFS) and overall survival (OS) at 3 years. Patterns of cHL recurrence, the occurrence of SPM, and causes of death were also evaluated. PFS and OS were analyzed using the Kaplan–Meier method. PFS was defined as the time between randomization and progression or relapse of cHL or death from any cause and was censored at the date of last information on the disease status. OS was defined as the time between randomization and death from any cause and was censored at the date of last information for surviving patients. Characteristics of cHL recurrence, SPM, and causes of death were analyzed descriptively. Study design, inclusion criteria, endpoints, procedures, and treatment have been published elsewhere [5]. The study was conducted in accordance with the Declaration of Helsinki and was approved by the review boards of the participating sites. The study was registered at www.clinicaltrials.gov as #NCT01569204.
A total of 104 patients with advanced-stage cHL aged 18–60 years were enrolled at 20 sites in Germany. Baseline characteristics have been reported previously. In brief, 63 patients (61%) were male, the median age was 29 years (range: 18–60 years), and 86 patients (82%) presented with stage III/IV disease [5]. Baseline characteristics were thus consistent with the randomized German Hodgkin Study Group (GHSG) HD15 and HD18 studies for advanced-stage HL [1, 2]. Three patients were not included in the outcome analyses since they did not receive study treatment (n = 2) or terminated study treatment after the advanced-stage disease had been disconfirmed (n = 1). Hence, the present analysis included 101 patients who had been treated with 6 cycles of BrECAPP (n = 49) or BrECADD (n = 52); 13 patients (BrECAPP: 7 patients; BrECADD: 6 patients) with residual lymphoma ≥2.5 cm and a positive positron emission tomography (PET) at the end of systemic therapy had an indication for consolidation radiotherapy [5].
After a median observation time of 34 months (interquartile range: 28.7–39.5 months), the 3-year PFS estimates were 90.2% (95%-CI: 80.9–99.5%) with BrECAPP and 89.7% (95%-CI: 81.0–98.3%) with BrECADD (Fig. 1A, Table 1). In the randomized ECHELON-1 study for newly diagnosed stage III/IV cHL, the 3-year PFS among patients aged younger than 60 years who had treatment with the BV-containing A-AVD (BV, doxorubicin, vinblastine, dacarbazine) regimen was 84.9% (95%-CI: 81.6–87.7%) [6]. Disease control with BrECAPP and BrECADD was thus at least similar to and possibly better than with A-AVD.
Eight patients treated in the present study experienced primary disease progression (n = 3) or relapse of cHL (n = 5). Sites of initial bulky disease were involved in 6 cases. The median time from the end of BrECAPP or BrECADD therapy to disease progression or relapse was 13 months (range: 1–26 months). Second-line treatment consisted of high-dose chemotherapy and autologous stem cell transplantation in all cases. No study participant developed an SPM (Table 1). This is notable since older analyses had indicated an increased risk especially for the development of therapy-related acute myeloid leukemia and myelodysplastic syndrome (t-AML/MDS) after 8 cycles of eBEACOPP [3, 7, 8]. However, the current GHSG standard of care for advanced-stage HL consisting of 4 or 6 cycles of eBEACOPP stratified by PET after 2 cycles of chemotherapy appears to be associated with a significantly lower risk. The t-AML/MDS incidence among patients who had received 4 or 6 cycles of eBEACOPP within the HD15 and HD18 studies was lower than 1% [1, 2]. Unlike second hematologic malignancies that usually occur within the first years after HL treatment, the risk for the development of second solid tumors after BrECAPP and BrECADD cannot be estimated yet [7, 9, 10]. Longer follow-up is required since second solid tumors are typically diagnosed many years after HL treatment and the risk for the occurrence of such malignancies seems to be elevated for decades [11, 12].
Two patients who had treatment in the present study died during observation. Deaths occurred 15 and 24 months after the end of systemic study treatment. One of the deaths was due to cHL (Table 1). A low rate of HL-related deaths was also observed in other studies comprising patients with advanced-stage HL, e.g., the HD15 and HD18 studies using eBEACOPP and the RATHL study using ABVD [1, 2, 13].
The 3-year OS estimates were 100% with BrECAPP and 95.4% (95% CI: 89.2–100%) with BrECADD (Fig. 1B, Table 1). In the ECHELON-1 study, the 2-year OS among patients treated with A-AVD was 96.6% [14].
The present analysis has some limitations. Given the mostly young age at diagnosis and the high cure rate, quality of life (QoL) aspects and fertility issues play an important role in the management and the choice of treatment in HL patients [4, 15]. However, valid analyses on QoL and fertility in individuals who had received BrECAPP or BrECADD could not be performed due to the inability to obtain sufficient data.
Taken together, the present update analysis of a randomized phase II study investigating the BV-containing eBEACOPP variants BrECAPP and BrECADD in the first-line treatment of advanced-stage cHL confirms the safety and efficacy of these protocols. The BrECADD regimen had been chosen to challenge eBEACOPP in the randomized GHSG HD21 study (NCT02661503) that recently finished recruitment for the cohort of patients aged 60 years or younger. Results of this trial are pending. Results were in part presented at the EHA 2021 Virtual Congress, June 9 to 17, 2021.
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CD, SK, FB, SM, JM, MS, MST, VV, AZ, BvT, MF, AE, PB, and DAE provided study material or patients. CD, HG, AP, and DAE analyzed data. CD, HG, and DAE wrote the manuscript. All authors approved the final manuscript.
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BvT is an advisor or consultant for Amgen, BMS/Celgene, Novartis, Pentixafarm, Pfizer, Takeda, Merck Sharp & Dohme, and Gilead Kite; has received honoraria from Novartis, Roche Pharma AG, Takeda, and Merck Sharp & Dohme; reports research funding from Novartis (Inst), Merck Sharp & Dohme (Inst), and Takeda (Inst); and reports travel support from AbbVie, AstraZeneca, KiteGilead, Merck Sharp & Dohme, Takeda, and Novartis. AZ has received honoraria from Takeda; and reports travel grants from Takeda. All other authors report no potential conflicts of interest.
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Damaschin, C., Goergen, H., Kreissl, S. et al. Brentuximab vedotin-containing escalated BEACOPP variants for newly diagnosed advanced-stage classical Hodgkin lymphoma: follow-up analysis of a randomized phase II study from the German Hodgkin Study Group. Leukemia 36, 580–582 (2022). https://doi.org/10.1038/s41375-021-01386-z
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DOI: https://doi.org/10.1038/s41375-021-01386-z
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