The potential for chemotherapy-free strategies in mantle cell lymphoma.

Mantle cell lymphoma (MCL) may be 1 of the few cancers for which multiple chemotherapy and nonchemotherapy regimens are considered as standard. Despite the significant activity of chemotherapy in the first-line setting and beyond, its limitations are reflected in the relatively poor ultimate outcomes of patients with MCL treated in the real world. Patients with highly proliferative MCL and those with TP53 mutations tend to respond poorly despite intensive cytotoxic therapies. Patients with comorbidities and those who are geographically isolated may not have access to the regimens that may appear most promising in clinical trials. Thoughtfully directed, nonchemotherapy agents might overcome some of the factors associated with a poor prognosis, such at TP53 mutation, and might resolve some of the challenges related to the toxicity and deliverability of standard chemotherapy regimens. Several clinical trials have already demonstrated that combinations of nonchemotherapy plus chemotherapy drugs can impact outcomes, whereas data with nonchemotherapy agents alone or in combination have suggested that some patients might be well suited to treatment without chemotherapy at all. However, challenges including chronic or unexpected toxicities, the rational vs practical development of combinations, and the financial acceptability of new strategies abound. The nonchemotherapy era is here: how it unfolds will depend on how we meet these challenges.