What is your approach to a patient with locally advanced cervical cancer who presents with a fistula (rectal or bladder)?

For bladder fistula, we usually get a bilateral nephrostomy done for diversion and then treat patients with definitive intent with chemo RT with brachy using an interstitial device. We reassess the patient with PET/CT in 3 months and if complete responses, then they get urinary diversion with ideal ...