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Brief Title: Treatment With Pyrotinib-Based Therapy in Lapatinib Resistant HER2-Positive Metastatic Breast Cancer
Official Title: Treatment With Pyrotinib-Based Therapy in Lapatinib Resistant HER2-Positive Metastatic Breast Cancer: A Real World Study
Study ID: NCT04899128
Brief Summary: This is a multicenter, observational, single-arm real world study to evaluate the efficacy and safety of pyrotinib after lapatinib progression.
Detailed Description: HER2-positive breast cancers account for 15%-20% of all breast cancers. The development of HER2 targeted therapies have greatly improved the survival of HER2-positive breast cancer patients. Lapatinib has shown effectiveness in treating HER2-positive metastatic breast cancers, but therapies after lapatinib progression are still controversial. This study is aimed to evaluate the efficacy and safety of pyrotinib after lapatinib progression.
Minimum Age: 18 Years
Eligible Ages: ADULT, OLDER_ADULT
Sex: FEMALE
Healthy Volunteers: No
Jiangsu Provincial People's Hospital, Nanjing, Jiangsu, China