How would you approach a small mucinous adenocarcinoma of the anal verge (without anal canal involvement) with positive margins after resection?

If resection is not feasible to get negative margins without an APR then I would favor treating with concurrent chemo (xeloda) with RT to a dose in mods 50s to area of positive margin.

Agree with concurrent (xeloda-based) chemoradiation 50-54Gy and close observation subsequently.