Background: Despite a higher risk of classical Hodgkin lymphoma (cHL) in people with HIV and the demonstrated safety and efficacy of PD-1 blockade in cHL, there are limited data on the use of these agents in HIV-associated cHL (HIV-cHL)., Patients/methods: We retrospectively identified patients with HIV-cHL from the "Cancer Therapy using Checkpoint inhibitors in People with HIV-International (CATCH-IT)" database who received nivolumab or pembrolizumab, alone or in combination with other agents, and reviewed records for demographics, disease characteristics, immune-mediated adverse events (imAEs), and treatment outcomes. Changes in CD4 + T-cell counts with treatment were measured via Wilcoxon signed-rank tests. Overall response rate (ORR) was defined as the proportion of patients with partial or complete response (PR/CR) per 2014 Lugano classification., Results: We identified 23 patients with HIV-cHL who received a median of 6 cycles of PD-1 blockade: 1 as 1st-line, 6 as 2nd-line, and 16 as ≥3rd-line therapy. Seventeen (74%) patients received monotherapy, 5 (22%) received nivolumab plus brentuximab vedotin, and 1 received nivolumab plus ifosfamide, carboplatin, and etoposide. The median baseline CD4 + T-cell count was 155 cells/µL, which increased to 310 cells/µL at end-of-treatment (P = .009). Three patients had grade 3 imAEs; none required treatment discontinuation. The ORR was 83% with median duration of response of 19.7 months. The median progression-free survival was 21.2 months and did not differ between patients with <200 versus ≥200 CD4 + cells/µL (P = .95)., Conclusion: Our findings support the use of PD-1 blockade in HIV-cHL for the same indications as the general population with cHL., Competing Interests: Disclosure KL and RR: Bristol Myers Squibb-Celgene, Merck, EMD-Serono, Eli Lilly, Janssen, Lentigen, and CTI BioPharma research support through CRADAs with the NCI. DBJ: BMS, Catalyst Biopharma, Iovance, Mallinckrodt, Merck, Mosaic ImmunoEngineering, Novartis, Oncosec, Pfizer, Targovax, and Teiko—advisory boards or consultancy; BMS and Incyte—research funding. NAW: ChemoCentryx—consultancy and speaker honoraria CK: Ad board/Consulting fee: Novartis, Regeneron, Janssen, Eisai, Daiichi Sankyo, Jazz Pharmaceuticals, Arcus Biosciences, Mirati Therapeutics, Sanofi, Diffuse Pharmaceuticals; Grant Support: Blueprint Medicines, Bristol-Myers Squibb, Daiichi Sankyo, Inc., Debiopharm, Genentech, Inc., Janssen, Karyopharm, Lyell, Novartis Pharmaceuticals, Regeneron, Spectrum TF: ADC therapeutics—speakers bureau; Astrazeneca—Consultancy and Speakers Bureau; Daiichi—Speakers Bureau; Sankyo—Speakers Bureau; Genmab—Consultancy and Speakers Bureau; Karyopharm—Speakers Bureau; Kite/Gilead—Honoraria and Speakers Bureau; MorphoSys—Speakers Bureau; Secura Bio—Speakers Bureau; Juno/Bristol Myers Squibb (BMS)—Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees and Research Funding; Celgene Corporation—Membership on an entity's Board of Directors or advisory committees; Janssen—Membership on an entity's Board of Directors or advisory committees; Pharmacyclics LLC/Janssen—Honoraria and Membership on an entity's Board of Directors or advisory committees; Seattle Genetics—Membership on an entity's Board of Directors or advisory committees and Research Funding; Takeda—Honoraria, Membership on an entity's Board of Directors or advisory committees and travel expenses; Abbvie—Consultancy and Honoraria; Seagen—Consultancy, Honoraria, travel expenses, and Speakers Bureau; Bayer—honoraria; Portola Pharmaceuticals—research funding; Eisai—research funding; Kyowa Kirin—research funding; Amgen—research funding; Viracta Therapeutics—research funding; Cell Medica—research funding; Roche—research funding; Trillium Therapeutics—research funding; Pfizer—research funding AD: Athos Therapeutics—Current Employment, Current holder of stock options in a privately-held company, Membership on an entity's Board of Directors or advisory committees and Patents & Royalties; Attica Sciences—Current Employment, Current holder of stock options in a privately-held company, Membership on an entity's Board of Directors or advisory committees and Patents & Royalties; Dyania Health—Consultancy, Current Employment and stocks; Urogen Pharma- Stocks; Alimera Sciences—stocks; Kyn Therapeutics—stocks; Moderna Therapeutics—stocks; Proteas Bioanalystics—stocks and patents and royalties; BMS—consultancy and research funding; AstraZeneca—Consultancy, Other: Travel, accommodations, expenses and Research Funding; Radmetric—consultancy; Seagen—Consultancy and travel, accommodations, expenses; Janssen—consultancy; PACT Pharma—consultancy; Merck—Consultancy and Research Funding; Roche/Genentech—Consultancy and Research Funding; Exelixis—consultancy; Aveo—consultancy; Kite/Gilead—research funding; Jounce Therapeutics—Research funding; Infinity Pharmaceutics—research funding; Seattle Genetics/Astellas—research funding; Immunomedics/Gilead—research funding; Harvard Medical School—patents and royalties to spouse; UCLA—patents and royalties to spouse; Eli Lilly—travel, accommodations, expenses MM: Genentech/Roche—honoraria and speakers bureau, Novartis—honoraria, Sanofi—honoraria, Lexicon—honoraria and Research Funding, Ipsen—Honoraria and Speakers Bureau, Bayer—honoraria, Taiho Pharmaceutical—Honoraria and speakers bureau, Boehringer Ingelheim—honoraria, Eisai—Honoraria, Research Funding and Speakers Bureau, Merck—Honoraria and Research Funding, Exelixis—Honoraria and Speakers Bureau, AstraZeneca/Daiichi Sankyo—Honoraria and Speakers Bureau, Servier—Honoraria and Speakers Bureau, Tersera—Honoraria, QED Therapeutics—Honoraria, Precision Biologics—Research Funding, BMS—research funding, Onyx—research funding, Advanced Accelerator Applciations—research funding, AlphaVax—Research Funding, Duke University—Patents and Royalities DBJ: Advisory boards/consultancy: BMS, Catalyst Biopharma, Iovance, Jansen, Mallinckrodt, Merck, Mosaic ImmunoEngineering, Novartis, Oncosec, Pfizer, Targovax, and Teiko; Research funding: BMS and Incyte AM: Research funding: Nektar, Tracon Pharma, Regeneron, Tempu slabs; Consultancy and research funding: SpringWorks Therapeutics; Honoraria: Targeted Oncology CD: Advisory Board: GenMab; BeiGene; ADC Pharmaceuticals Research funding: Genentech; Seagen; Astrazeneca AL: Advisory Board—Seagen, Kite Pharma; Consultancy—Research to Practice GS: Advisory Board: BMS, Genentech, EMD Serono, Merck, Sanofi, Seattle Genetics/Astellas, Astrazeneca, Exelixis, Janssen, Bicycle Therapeutics, Pfizer, Gilead, Scholar Rock, G1 Therapeutics, Eli Lilly/Loxo Oncology, Infinity Pharmaceuticals, Lucence Health, IMV, Vial, Syapse, Tempus, Ellipses Pharma; Consultant/Scientific Advisory Board (SAB): Suba Therapeutics, Syapse, Servier, Merck Research Support to institution: Sanofi (iaward), Astrazeneca, Gilead, Helsinn, Lucence, BMS, EMD Serono, Jazz Therapeutics; Speaker: BIO—INFORMAÇÃO BRASILEIRA DE ONCOLOGIA Ltda, OLE Forum (Mexico), Seagen, Gilead, Natera, Exelixis, Janssen, Bayer; Data safety monitoring committee honorarium: Mereo; Employment: Spouse employed by Myriad; Writing/Editor fees: Uptodate, Onviv PR: research funding (to institution)—Lilly, Bayer, Telix; speaker's fees—OncLive ARN: Funding to Institution for Trials he is PI on: Loxo@Lilly, Surface Oncology, ADC Therapeutics, IGM Biosciences, EMD Serono, Aravive, Nikang Therapeutics, Inspirna, Exelexis, Revolution Medicine, Jacobio, Pionyr, Jazz Pharmaceuticals, NGM Biopharmaceuticals; Consultant Editor Compensation: JCO Precision Oncology; Travel Compensation from: SITC/ AACR/ Conquer Cancer Foundation/BinayTara Foundation and Foundation Med/Caris Life Sciences; Advisory Board : Foundation Med AFH: Bristol Myers Squibb—research funding, consultancy; Genentech—research funding, consultancy; Merck—research funding, consultancy; Seattle Genetics—research funding, consultancy; KiTE Pharma—research funding; Gilead Sciences—research funding; AstraZeneca—research funding, consultancy; Karyopharm—consultancy; ADC Therapeutics—research funding, consultancy; Takeda—consultancy; Tubulis—consultancy; Regeneron—consultancy; Genmab—consultancy; Pfizer—consultancy; Caribou Biosciences—consultancy; Adicet Bio—consultancy; Abbvie—consultancy; Allogene Therapeutics—consultancy All other authors have nothing to disclose., (Published by Elsevier Inc.)