The Rechallenge of ADCs in MBC Patients

A Multicenter, Real-world Study of the Efficacy and Safety of Antibody-drug Conjugates (ADCs) Rechallenge in Patients with Prior Exposure to ADCs Metastatic Breast Cancer

To investigate the efficacy and safety of ADC rechallenge

Inclusion Criteria:

• age > 18 years old.
• Diagnosed with Metastatic Breast Cancer.
• Patients with prior exposure to ADC (either in the adjuvant setting or metastatic disease are allowed).
• Patients plan to or have received ADCs for the second or more time.
• Complete medical history was available.

Exclusion Criteria:

• Medical history was incomplete