Chronic lymphocytic leukemia (CLL) is the most common type of leukemia in adults. Its prevalence is expected to increase alongside rising overall survival rates in patients with CLL achieved due to advances in therapy [1]. B-cell receptor signalling through Bruton’s tyrosine kinase (BTK) is one of the main pathways for the development of CLL. Acalabrutinib, the second-generation VTK inhibitor, has been made available recently to Russian patients, which presence in the market can improve the prognosis for such patients.