Overview BIBW 2992 and Letrozole in Hormonoresistant Metastatic Breast Cancer Status: Completed Trial end date: 1969-12-31 Target enrollment: Participant gender: Summary Progression-free rate after 16 weeks of BIBW 2992 administration in association with letrozole Phase: Phase 2 Details Lead Sponsor: Boehringer IngelheimTreatments: AfatinibLetrozole