Breast cancer patients with ER mutations may benefit from early switch to Faslodex/Ibrance

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Among patients with hormone receptor-positive breast cancer treated with an aromatase inhibitor plus Ibrance (palbociclib), those who displayed a rising ESR1 mutation detected in their blood before disease progression doubled their median progression-free survival following a switch to Faslodex (fulvestrant) plus Ibrance, according to results from the phase III PADA-1 clinical trial. 

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