POST URS Chemotherapy Instillation

The goal of this study is to evaluate the safety and oncological outcomes of single chemotherapy bladder instillation following endoscopic treatment for UTUC in UTUC suspected patients .The main aim is to determine the efficacy of a single, post URS, chemotherapy bladder instillation to reduce IVR. Participants will be given single chemotherapy bladder instillation within 24h following ureteroscopy and will follow routine follow-up for IVR which will include white light cystoscopy ;patients with suspected IVR (based on either imaging or cystoscopy) will undergo TURBT.