What risk factors prompt you to treat an early-stage nasal squamous cell carcinoma of the skin with post-operative radiation to the primary and/or elective nodal radiation?  

I would probably treat the site of the primary tumor if margins were positive and further surgery was not planned, tumor invaded to a depth of 6 mm or more, or there was perineural invasion of a nerve 0.1 mm or greater in diameter.  I would probably not recommend elective nodal irradiation unl...