Clonal Dynamics of Chronic Lymphocytic Leukaemia Treated With Pirtobrutinib After Previous Treatment With Zanubrutinib

Pirtobrutinib is a first-in-class, oral noncovalent Bruton tyrosine kinase (BTK) inhibitor (BTKi) that was approved in January 2023 in the United States for the treatment of relapsed/refractory (R/R) mantle cell lymphoma (MCL) and later that same year CLL. It is currently being investigated across several global randomised phase III trials for frontline and R/R chronic lymphocytic leukaemia (CLL).