High risk patients included 15% del 17p, 10% del 11q, 5% ZAP and 5% TP53 mutations….In all 21 evaluable pts with a median follow-up of 4.9 months, 7 patients showed partial response (33%) while the remaining 14 patients showed stable disease (67%)….Tenalisib showed promising single agent anti-tumor activity in patients with CLL with a favourable safety profile.