Susan

I had just been told by a cardiologist that my calcium coronary scan showed major blockage but my echo-cardiogram stress test showed full function and I had zero heart problems or complications from Erbitux. The worst side effect for me was that it intensified my radiation dermatitis so the "rash" ended up just having all skin peel off.
I would take Erbitux all over again if I had the choice but I would take it in combination with carboplatin if I had a "do-over". My opinion is that your sister should definitely do some chemo along with the Radiation even she passes on Erbitux.
Charm