To study risk of Richter syndrome and germline genetic variations.
Patients prospectively and longitudinally followed at Mayo Clinic included patients with newly diagnosed CLL (<9 months from diagnosis).
Germline polymorphisms in single SNP, rs4987852, which encodes for BCL2 associated with increased risk of RS (ordinal HR=3.9; 95% CI=1.6-9.8; p-value=0.004).
Findings present in 48/605 (8%) non-transformed CLL patients and in 4/15 (27%) patients with RS.