BrAin Metastasis in TripLe Negateive Breast Cancer: IvoneScimab and Trop2 ADC

Ivonescimab: 20 mg/kg, ivggt, day 1, every 3 weeks; Sacituzumab govitecan: 10 mg/kg, ivggt, day 1 and day 8, every 3 weeks;