Purpose: Accurate contouring in head and neck cancer (HNC) is critical. International consensus guidelines recommend the 5 + 5 mm rule for expansions around the primary tumor. wherein high- and low-dose clinical target volumes (CTV-P1 and CTV-P2. respectively) are created using successive 5 mm expansions on the gross tumor volume. https://www.markbroyard.com/best-catch-acure-ultra-hydrating-plant-ceramide-daily-facial-lotion-50ml-fashion-great-buy/