Advances in Hodgkin Lymphoma Treatment: From Molecular Biology to Clinical Practice

Simple Summary Classical Hodgkin Lymphoma is a blood cancer, accounting for 0.5% of all new cancer diagnoses. Despite high cure chances, approximately 20% of patients are refractory to frontline treatment or relapse thereafter. Treatment strategies for relapsed/refractory patients have progressively lower chances of inducing a persistent complete remission. Therefore, great efforts are being made to further improve rates of response of frontline therapy, as well as to explore the efficacy of new compounds and different drug combinations. The present review aims to summarize these efforts, offering an overview of recent advances and future perspectives in the field.Abstract Classical Hodgkin Lymphoma (cHL) is a highly curable disease, but around 20% of patients experience progression or relapse after standard frontline chemotherapy regimens. Salvage regimens followed by autologous stem cell transplants represent the historical treatment approach for these cases. In the last decade, with the increasing understanding of cHL biology and tumor microenvironment role in disease course, novel molecules have been introduced in clinical practice, improving outcomes in the relapsed/refractory setting. The anti-CD30 antibody-drug conjugated brentuximab vedotin and PD-1/PD-L1 checkpoint inhibitors represent nowadays curative options for chemorefractory patients, and randomized trials recently demonstrated their efficacy in frontline immune-chemo-combined modalities. Several drugs able to modulate the patients' T-lymphocytes and NK cell activity are under development, as well as many anti-CD30 chimeric antigen receptor T-cell products. Multiple tumor aberrant epigenetic mechanisms are being investigated as targets for antineoplastic compounds such as histone deacetylase inhibitors and hypomethylating agents. Moreover, JAK2 inhibition combined with anti-PD1 blockade revealed a potential complementary therapeutic pathway in cHL. In this review, we will summarize recent findings on cHL biology and novel treatment options clinically available, as well as promising future perspectives in the field.