Investigation of Thrombocytopenia Associated with Trastuzumab Emtansine Treatment in Breast Cancer: A Retrospective Study in a Chinese Population

Thrombocytopenia is a prevalent adverse event during T-DM1 treatment in real-world practice. An increased incidence with concurrent radiotherapy was observed. While the incidence of thrombocytopenia appears to rise with prolonged exposure in completed or ongoing T-DM1, it may have a minor impact on the overall duration of therapy. Future studies should examine these findings to guide prophylactic strategies and interventions for high-risk patients.