Serious bronchopulmonary involvement due to chronic lymphocytic leukaemia

To the Editor: Chronic lymphocytic leukaemia (CLL) is the most common type of leukaemia, accounting for 40% of all cases in individuals >65 years of age. Thoracic complications of CLL can be classified into three groups: 1) infectious complications, which are by far the most frequent and are directly related to the severity of immunodeficiency secondary either to leukaemia or therapy; 2) pleural effusions that are either in CLL localisation or related to venous or lymphatic compression caused by a mass or lymph node, and 3) specific bronchopulmonary involvement secondary to lymphocytic infiltration. Specific bronchopulmonary involvement due to chronic lymphocytic leukaemia (or pathologic leukaemic bronchopulmonary infiltration (LBPI)) is rare and there are few reports in the literature. We report the cases of six patients with CLL and bronchopulmonary leukaemic infiltrates who needed specific treatment due to the severity of respiratory symptoms. The patients’ characteristics are summarised in table S1 in the online supplementary material. All patients gave their written informed consent for inclusion in this report. The six patients were all males. Mean age was 70 years (range 64–74 years). Patient 1 was a current smoker (40 pack-years) and patients 4 and 6 were former smokers (10 PA). CLL had been diagnosed in all patients through a combination of blood hyperlymphocytosis, characteristic lymphocyte morphology and immunophenotyping carried out in the Haematology Department (Tours university Hospital, Tours, France), an average of 6.2 years previously (range 3–14 years). At diagnosis, none of the patients presented with respiratory symptoms or computed tomography (CT) scan abnormalities indicative of LBPI. Patients 1, 2, 4, 5 and 6 had a previous pulmonary history of infectious pneumonia. Only patient 1 had never received specific CLL treatment. All …