Would uterine perforation at the time of hysterectomy push you to recommend pelvic RT in a patient who would otherwise receive cuff brachytherapy?  

It very likely would.  I suppose that various factors could impact the decision, including the usual prognostic factors, patient's general condition and co-morbidities, etc.  But, yes, a uterine perforation at the time of hysterectomy would represent another risk factor that would push me ...