Pencil-beam scanning proton re-irradiation showed low acute toxicity in recurrent head and neck cancer
Pencil-beam scanning proton re-irradiation achieved 17.2-month median survival with 7.7% grade 3 or higher oral mucositis.
Pencil-beam scanning proton re-irradiation achieved 17.2-month median survival with 7.7% grade 3 or higher oral mucositis.
Median survival was 8.3 months after proton reirradiation, with 5.6% grade 3–4 radiation necrosis and no survival difference versus photons.
ESTRO–ASTRO guidance supports selected rectal cancer reirradiation using 30–40 Gy regimens, cumulative dose assessment, inverse planning and daily volumetric imaging.
Pencil-beam proton reirradiation for locoregional breast cancer recurrence achieved 95% three-year overall survival, with severe toxicity uncommon despite a 21% rib-fracture rate.