Background: Major infections (MIs), secondary cancers (SCs) and autoimmune diseases (ADs) are the most common and relevant complications in patients with chronic lymphocytic leukaemia.
Methods: We performed a single-centre retrospective study to investigate the prevalence of the above quoted complications, the association with most important prognostic markers and their impact on survival (n = 795).
Results: Almost one out of three patients experienced at least one complication and only 0.9% of the cohort developed all three complications. One hundred and twenty (20%) subjects developed SC, 98 MI (12%) and 80 AD (10%); these complications seem to occur in a mutually exclusive manner. By Kaplan-Meier analysis we estimated that after 20 years from the diagnosis SC, MI and AD occurred in 48%, 42% and 29% of patients, respectively. Furthermore, we showed that some clinical and biological markers are skewed among patients with different complications and that subjects with MI and SC had a worse prognosis than those with AD and all other patients (p < 0.0001).
Conclusions: This study reveals the existence of different clinical subsets of chronic lymphocytic leukaemia patients characterised by an increased and different risk for developing specifically MI, SC and AD.
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