Safety profile of KRAS G12C inhibitors combined with thoracic radiation therapy.

Miller, David Gibbes; Zhang, Y Helen; Thor, Maria; Shin, Jacob Y; Imber, Brandon S; Offin, Michael David; Haseltine, Justin; Chaunzwa, Tafadzwa Lawrence et al. · Radiother Oncol · 2026

retrospective_cohort · Level III

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Abstract

We evaluated acute toxicity and disease control in 42 patients receiving thoracic radiotherapy with concurrent KRAS G12C inhibitors. Toxicity included 13 grade 2 events (31%) and one grade 3 pneumonitis. There were no significant differences in toxicity between patients who held versus continued inhibitors during radiotherapy. The estimated cumulative incidence of local failure at 6 months was 5%.