Even if TP53 mutations and deletions are less common in haematological neoplasms as compared to solid neoplasms, they can be found in Burkitt’s lymphoma, chronic myeloid leukaemia, adult T-cell leukaemia, B-cell prolymphocytic leukaemia, and chronic lymphocytic leukemia (26). The gene discussed is TP53; the disease is B-cell chronic lymphocytic leukemia.