The main aim is to check how effective BV is for treating adults with HL.

Study medication will be prescribed according to the clinic's standard practice.

Participants will visit the study clinic 5 times, once every 12 weeks. When study treatment has completed, a follow-up visit will be scheduled every 3 months during the first year and every 4-6 months during the next year.

This is a prospective, observational study in participants with HL who underwent or are candidates for ASCT and receiving or will receive the standard treatment of BV. This study will assess the safety profile and effectiveness of BV in pre and post-ASCT in the real-world clinical practice.

The study will enroll approximately 70 participants.

The data will be collected and recorded in electronic case report forms (e-CRFs) in scope of National Drug Program (NDP). All the participants will be assigned to two observational cohorts:

• HL Participants: BV Salvage Pre-ASCT
• HL Participants: BV Consolidation Treatment Post-ASCT

This multi-center trial will be conducted in Poland. All participants will be followed up for 24 months. The overall duration of the study will be approximately 4.5 years.

Inclusion Criteria:

1. Adult participant (aged greater than or equal to [>=18] years) that underwent or are candidates for ASCT and were enrolled in BV HL NDP receiving treatment according to the Summary of Product Characteristics for Adcetris and NDP.

Exclusion Criteria:

1. Currently participates or plans to participate in any interventional clinical trial.
2. Any other reason that, in the Investigator's opinion, makes the participant unsuitable to participate in this study.

Participants diagnosed with HL (previously enrolled in BV HL NDP) who underwent or are candidates for ASCT will be enrolled in this study.

Takeda provides access to the de-identified individual participant data (IPD) for eligible studies to aid qualified researchers in addressing legitimate scientific objectives (Takeda's data sharing commitment is available on https://clinicaltrials.takeda.com/takedas-commitment?commitment=5). These IPDs will be provided in a secure research environment following approval of a data sharing request, and under the terms of a data sharing agreement.

IPD from eligible studies will be shared with qualified researchers according to the criteria and process described on https://vivli.org/ourmember/takeda/ For approved requests, the researchers will be provided access to anonymized data (to respect patient privacy in line with applicable laws and regulations) and with information necessary to address the research objectives under the terms of a data sharing agreement.