Sacituzumab tirumotecan (SKB264) is an antibody-drug conjugate (ADC) targeting TROP2 (trophoblast cell surface antigen 2), capable of releasing the active payload KL610023 within TROP2-positive tumour cells. an effective topoisomerase I inhibitor that induces DNA damage and leads to cell cycle arrest and apoptosis, for use in non-small cell lung cancer (NSCLC) and triple-negative breast cancer (TNBC).