Twelve pts were enrolled in the TN cohort; median age was 62 (range 44-75). Six pts were Rai stage III/IV, and 1 had both del(17p) and del(11q)….After C6, ORR was 67% [1 complete response (CR), 7 partial responses (PR); 90% confidence interval (CI): 39-88]; responses remained the same after C12. Three pts completed treatment per protocol, 3 discontinued treatment for progressive disease (PD) and 6 for AEs....Taf plus Len was well tolerated....Taf in combination with Len appeared safe and demonstrated promising activity in TN CLL...