Real-World Study Shows Safe Rechallenge with Trastuzumab Deruxtecan After Grade 1 Interstitial Lung Disease
- A multi-institutional study of 1,476 patients found that 75% of those with grade 1 interstitial lung disease (ILD) were successfully rechallenged with trastuzumab deruxtecan, remaining on therapy for a median of 215 days.
- Patients treated with steroids for grade 1 ILD showed significantly faster radiographic improvement (29 days vs 82 days without steroids), supporting early steroid intervention.
- Only 27% of rechallenged patients developed recurrent ILD, mostly grade 1, with no deaths from ILD after rechallenge, demonstrating the safety of this approach.
- The study provides real-world evidence supporting rechallenge protocols for grade 1 ILD, potentially maximizing clinical benefit from this pivotal HER2-targeted therapy.