Efficacy
The ORR of for all iNHL was 57%, with a complete remission (CR) rate of 6%. The ORR by subtype were similar however it was noted that numbers were small for some categories. Specifically the ORR by subtype were: FL 54%, SLL 61%, MZL 47%, LPL/WM 80%.r
The median time to response was 1.9 months, median duration of response 12.5 months and median progression free survival (PFS) was 11 months.r
The median duration of treatment was 6.6 months, with a range of 0.6 to 23.9 months. Progressive disease accounted for 33% of all discontinuations, while adverse events 20% of discontinuation.r
In a post hoc sub group study analysing only the follicular lymphoma cohort from the phase 2 study, the authors described a median duration of treatment by idelalisib of 8.2 months, during which 59% of all patients experienced a greater than 50% decrease in disease related sum of the product of diameters (SPD). ORR in this sub-analysis was 55.6% with a 13% CR rate. The median time to first response was 2.6 months and the median duration of response was 10.8 months.r

© N Engl J Med 2014