Comments on the Publication by Corkum et?al on “Does 5 + 5?mm Equal Better Radiation Treatment Plans in Head and Neck Cancers?”

摘要

This retrospective planning study addresses the issueof gross tumor volume (GTV) to clinical target volume(CTV) margins in head and neck squamous cell carcinoma in light of the recently published internationalguidelines recommending the use of a 5 t 5 mm GTV toCTV margin with corrections for anatomy.1 Based on anevaluation of dose distribution in a series of 108 plans, theauthors conclude that with the use of a CTV-P1 of 5 mmaround the primary tumor GTV and a PTV of 5 mmaround the CTV, the addition of a CTV-P2 had no dosimetric impact, added complexity to the treatment planning, and could even introduce treatment errors.