What do you consider to be the regional nodal bed for a Merkel cell carcinoma of the thigh with a positive sentinel node in the inguinal chain?  

There's no clear right or wrong answer here - I would favor treating the superficial and deep inguinal nodes, capturing the chain as it extends superiorly and inferiorly with a generous margin above and below the site of the sentinel node. I would probably include the external iliac nodes if this c...

I concur with @Roy H. Decker. We have used very generous fields in the past. Dishearteningly, most relapses continue to be out of field. I'd cover the primary site + inguinal nodes and get as much of the external Iliacs feasible while minimizing exposure to bowel. I'd try to maintain contiguous fiel...