International Expert Consensus on Reirradiation for Recurrent Head and Neck Squamous Cell Carcinoma

International consensus statement offers pragmatic guidance on reirradiation for recurrent head and neck squamous cell carcinoma, covering patient selection, imaging, target delineation, and toxicity management to promote more consistent practice.

• Developed via structured expert consensus with formal agreement assessment, endorsed by the Reirradiation Collaborative Group, ESTRO, and ASTRO.
• Addresses modern conformal techniques (IMRT, protons, SBRT) and integral imaging (CT, MRI, PET) for target delineation and dose accumulation.
• Evidence remains heterogeneous, and recommendations reflect current expert practice rather than high-level prospective data.

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