Dr. Nathan Pennell, Cleveland Clinic, discusses the concept of acquired resistance and new agents designed to address it, including Rociletinib and Merelitinib.

Drs. Ben Solomon, Leora Horn, & Jack West compare the clinical data with the third generation EGFR TKIs so active in acquired resistance and consider whether there are significant differences between them.

Drs. Ben Solomon, Leora Horn, & Jack West review whether the data and clinical experience suggest any clinically significant differences among the first and second generation EGFR TKIs (Iressa, Tarceva, Gilotrif/Giotrif).

Drs. Leora Horn, Ben Solomon, & Jack West consider whether third generation EGFR TKIs, so active in patients with acquired resistance, might be best used prior to development of acquired resistance.

Dr. Greg Riely, medical oncologist from MSKCC, discusses the controversial question of whether patients should continue on an oral EGFR tyrosine kinase inhibitor after progression.

MSKCC medical oncologist Dr. Greg Riely explains the growing value of a repeat biopsy after the development of acquired resistance in patients with an EGFR mutation.

Medical oncologist Dr. Greg Riely, MSKCC, summarizes the development of acquired resistance after a good initial response to EGFR inhibitor therapy and the clinical patterns of progression commonly seen.