Should additional radiation be added to the total course in a HN patient who has an extended break during treatment?  

Extending standard RT overall time, without chemotherapy, results in a "loss" of about 0.7 Gy/day for each day treatment is extended beyond standard (on the other hand, acceleration results in a "gain" of 0.7 Gy per each day). These data are based both on pre-clinical experiments and clinical experi...