• Trastuzumab deruxtecan (T-DXd) received FDA approval for HER2-positive solid tumors, marking a significant expansion beyond breast, lung, gastric, and colorectal cancers.
• Clinical trials like DESTINY-PanTumor02, DESTINY-Lung01, and DESTINY-CRC02 demonstrated T-DXd's efficacy across various tumor types, especially those with high HER2 expression.
• T-DXd treatment requires careful monitoring due to potential adverse events like interstitial lung disease (ILD), necessitating proactive management strategies.
• The DEBBRAH trial showed promising antitumor activity of T-DXd in HER2+ and HER2-low advanced breast cancer patients with leptomeningeal disease (LMD), warranting further investigation.