Characteristics of patients with autoimmune haemolytic anaemia secondary to lymphoproliferative disorder: A single-centre retrospective analysis

Autoimmune haemolytic anaemia (AIHA) is a kind of autoimmune diseases characterized by autoantibodies which produced and secreted by abnormal activated B lymphocytes directed against red blood cells (RBC). Study reveals that about 50% AIHA mainly occurs secondary to lymphoproliferative disorders (LPD) and autoimmune diseases. In this study, we aim to explore the characteristics of patients with AIHA secondary to LPD. Fifteen patients with AIHA secondary to LPD (secondary group) and 60 with primary AIHA (primary group) were retrospectively included. Patients in the secondary group [(59.40 ± 4.74) y] were older than those in the primary group [(47.53 ± 2.30) y] ( p = 0.024). Reticulocyte counts were lower for the secondary group [(134.55 ± 20.67) × 10 9 /L] than for the primary group [(193.88 ± 27.32) × 10 9 /L] ( p = 0.09). Haptoglobin was higher in the secondary (0.75 ± 0.19) g/L than in the primary group (0.34 ± 0.05) g/L ( p = 0.004). The ratio of CD3 + CD4 + /CD3 + CD8 + was higher in the secondary (1.81 ± 0.41) than in the primary (1.05 ± 0.12) group ( p = 0.025). Duration of remission was shorter in the secondary [(23.52 ± 5.20) months] than in the primary [(40.87 ± 3.92) months] group ( p = 0.013). Relapse rate was higher for the secondary (33.3%) than for the primary (8.3%) group ( p = 0.003). Mortality rate was higher in the secondary (33.3%) than in the primary (8.3%) group ( p = 0.003). Progression-free survival was shorter in the secondary than in the primary group ( p = 0.021). In conclusion, patients with AIHA secondary to LPD showed higher age at diagnosis, shorter remission time, and higher recurrence and mortality rates than did those with primary AIHA.