-Author name in bold denotes the presenting author
-Asterisk * with author name denotes a Non-ASH member
Clinically Relevant Abstract denotes an abstract that is clinically relevant.

PhD Trainee denotes that this is a recommended PHD Trainee Session.

Ticketed Session denotes that this is a ticketed session.

1667 Potential Delayed Immune-Related Adverse Events in Patients Treated with Frontline Pembrolizumab + AVD for Classic Hodgkin Lymphoma

Program: Oral and Poster Abstracts
Session: 624. Hodgkin Lymphomas: Clinical and Epidemiological: Poster I
Hematology Disease Topics & Pathways:
Research, Clinical trials, Hodgkin lymphoma, Lymphomas, Clinical Research, Diseases, Lymphoid Malignancies, Adverse Events
Saturday, December 7, 2024, 5:30 PM-7:30 PM

Thomas M Kuczmarski, MD1, Chaitra S. Ujjani, MD2, Christina Poh, MD3, Edus H. Warren, MD, PhD1, Stephen D. Smith, MD1,3, Mazyar Shadman, MD, MPH3, Brian G. Till, MD4, Vikram Raghunathan, MD1*, Yolanda D Tseng, MD5*, Hongyan Du3*, Jacquelin Vandermeer, BS3*, Alyssa Kelly3*, Heather Rasmussen3*, Jenna M. Voutsinas, MPH6*, Ajay K. Gopal, MD7 and Ryan C Lynch, MD3

1Division of Hematology and Oncology, University of Washington, Seattle, WA
2Clinical Research Division, Fred Hutch Cancer Center; and Division of Oncology, University of Washington, Seattle, WA
3Fred Hutchinson Cancer Center, Seattle, WA
4Fred Hutchinson Cancer Center, University of Washington, Seattle, WA
5Department of Radiation Oncology, University of Washington and Fred Hutch Cancer Center, Seattle, WA
6Clinical Research Division, Fred Hutchinson Cancer Center, Seattle, WA
7University of Washington, Seattle, WA

Introduction

Concurrent PD1 inhibitor and chemotherapy has demonstrated high efficacy in patients with untreated classic Hodgkin lymphoma (CHL). Toxicities associated with PD-1 inhibitors are common and the majority of immune-related adverse events (irAE) occur within 3 months of initiation of therapy. However, with a half-life of 26 days, pembrolizumab may still be present after immune reconstitution following completion of therapy with doxorubicin, vinblastine, and dacarbazine (AVD), and some irAEs can occur long after exposure to PD1 inhibitor. Little is known about the delayed effects of frontline checkpoint inhibitors in patients with CHL. Here we report overall rates of potential delayed irAEs, as defined below, in our cohort of 50 patients treated with pembrolizumab and AVD (APVD).

Methods

We performed chart reviews for all 50 patients enrolled on a single center investigator-initiated clinical trial of APVD for untreated classic Hodgkin lymphoma. Potential delayed irAEs were defined as any adverse event likely related to pembrolizumab occurring at least 30 days after last pembrolizumab dose. We obtained all pertinent clinical data from the electronic medical record and from the clinical trial’s electronic database.

Results

In this study, 9 (18%) patients experienced a potential delayed irAE with a total of 12 distinct irAEs. Among patients experiencing a delayed irAE, mean time to onset after completion of APVD therapy was 163 days (range 26 – 858 days), and mean time to onset after last pembrolizumab exposure was 169 days (range 33 – 858 days).

Of the recorded irAEs, 4 were grade 1, 6 were grade 2, and 2 were grade 4. The average age of patients with a delayed irAE was 38.1 years, and the average age of patients without a delayed irAE was 39.4 years.

The majority of the irAEs were endocrinopathies, with four cases of hypothyroidism, two cases of hyperthyroidism, and one case of adrenal insufficiency. The patient who developed adrenal insufficiency presented with grade 4 adrenal insufficiency 395 days after completion of APVD therapy. One patient had a delayed cutaneous irAE, manifesting as a lichenoid dermatitis. Another patient developed a case of grade 2 anterior scleritis/uveitis that presented 858 days after last pembrolizumab dose and was treated with steroid eye drops. There was one case of grade 2 immune-mediated arthritis requiring steroids, one case of grade 2 colitis, and one case of grade 3 pneumonitis also requiring steroids. The patient who developed grade 4 pneumonitis presented 90 days after last dose of pembrolizumab with acute shortness of breath and required bilevel positive airway pressure and intravenous corticosteroids in the intensive care unit.

Three patients required oral steroids to treat their irAEs. One of these patients required it indefinitely due to adrenal insufficiency, while the other two patients required them for approximately 38 and 159 days.

Conclusions

Combination checkpoint inhibition and chemotherapy is an effective treatment option for patients with CHL in the frontline setting. However, treating oncologists should be aware of the potential for delayed irAEs associated with this regimen.

Disclosures: Ujjani: AbbVie, Astrazeneca, Lilly, PCYC: Research Funding; Abbvie, Astrazeneca, Beigene, Genentech, Jansen, Lilly, Pharmacyclics: Honoraria. Poh: Ipsen: Consultancy, Membership on an entity's Board of Directors or advisory committees; AstraZeneca: Membership on an entity's Board of Directors or advisory committees; Dren Bio: Research Funding; Astex: Research Funding; Seagen: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; Incyte: Research Funding; Acrotech: Consultancy, Membership on an entity's Board of Directors or advisory committees. Warren: Roche Diagnostics: Other: Travel Support. Smith: Ignyta (spouse): Research Funding; Karyopharm: Consultancy; Incyte: Consultancy, Research Funding; Bayer: Research Funding; KITE pharma: Consultancy; Enterome: Research Funding; Epizyme: Consultancy; ADC therapeutics: Consultancy, Research Funding; abbvie: Consultancy; AstraZeneca: Consultancy, Research Funding; Genentech: Consultancy, Research Funding; Lumanity: Consultancy; Millenium/Takeda: Consultancy; Merck Sharp and Dohme Corp: Research Funding; Beigene: Consultancy, Research Funding; Coherus Biosciences (spouse): Consultancy; Kymera Therapeutics: Research Funding; BMS (spouse): Research Funding; De Novo Biopharma: Research Funding. Shadman: Koi Biotherapeutics: Current holder of stock options in a privately-held company; Bristol Myers Squibb (spouse): Current Employment; Vincerx, Janssen: Research Funding; Morphosys/Incyte, Beigene, Genmab, AstraZeneca, Genentech, Abbvie: Consultancy, Research Funding; Merck, Nurix, Fate Therapeutics, Eli Lilly, Kite Pharma, Bristol Myers Squibb: Consultancy. Till: Mustang Bio: Consultancy, Patents & Royalties, Research Funding; Bristol Myers Squibb: Research Funding; Proteios Technology: Consultancy, Honoraria. Gopal: Merck: Consultancy, Honoraria, Research Funding; I-Mab bio: Research Funding; IgM Bio: Research Funding; Takeda: Research Funding; Gilead: Consultancy, Honoraria, Research Funding; Astra Zeneca: Research Funding; Agios: Membership on an entity's Board of Directors or advisory committees; Janssen: Consultancy, Honoraria, Research Funding; BMS: Research Funding; SeaGen: Research Funding; Teva: Research Funding; Genmab: Honoraria, Research Funding; Beigene: Consultancy, Honoraria, Research Funding; Incyte: Consultancy, Honoraria; Kite: Consultancy, Honoraria; Morphosys/Incyte: Consultancy, Honoraria; ADCT: Consultancy, Honoraria; Acrotech: Consultancy, Honoraria; Merck: Consultancy, Honoraria; Karyopharm: Consultancy, Honoraria; Servier: Consultancy, Honoraria; Cellectar: Consultancy, Honoraria; Compliment: Consultancy, Current holder of stock options in a privately-held company, Honoraria; Epizyme: Consultancy, Honoraria; Lilly: Consultancy, Honoraria; Caribou: Consultancy, Honoraria; Fresenius-Kabi: Consultancy, Honoraria; Scitek: Consultancy, Honoraria; Sana: Consultancy, Honoraria. Lynch: Merck: Honoraria; SeaGen, Foresight Diagnostics, Abbvie, Janssen: Consultancy; TG Therapeutics, Incyte, Bayer, Cyteir, Genentech, SeaGen, Rapt, Merck, Janssen: Research Funding.

*signifies non-member of ASH