A review of pathobiology and therapies for classic Hodgkin lymphoma.

Hodgkin lymphoma can be classified as classical Hodgkin lymphoma (cHL) based on the presence of hallmark Hodgkin and Reed-Sternberg cells. Through radiotherapy and modern chemotherapy, cHL has an impressive cure rate. We discuss normal B-cell maturation and the pathobiology of cHL, correlate significant cHL maturation steps with the sites of action of novel drugs, and highlight these drugs' efficacy in prior trials. In relapsed cHL, the approved agents brentuximab vedotin and immune checkpoint inhibitors have shown efficacy both alone and in combination with chemotherapy for salvage therapy, as maintenance after an autologous stem cell transplant, and after failure of this transplant. Chimeric antigen receptor T-cell therapy is being explored as a potential treatment option in relapsed/refractory cHL, and ongoing clinical trials show promising data without significant toxicity. We illustrate available novel therapeutic options and their efficacy in frontline and relapsed settings and discuss therapeutic benefit in relation to regimen toxicity.