What is your approach to definitive RT for nasal vestibule squamous cell carcinomas?

I would use IMRT. For N0, I would treat at a minimum levels 1B, 2, and the in-transit facial lymphatics that used to get included in the traditional "moustache field". These in-transit lymphatics have been designated as level IX in the 2014 consensus nodal guidelines. For node-positive, I also treat the lower levels on the side of involvement. Bolus and nasal plugs should be used as part of a standard nose set up. One useful resource is Radiotherapy for Head and Neck Cancers: Indications and Techniques by Drs. Ang and Garden.