An Exploratory Clinical Study of Nimotuzumab in Bladder - Sparing Chemoradiotherapy for Muscle - Invasive Bladder Cancer

The goal of this exploratory study is to evaluate the safety and efficacy of nimotuzumab combined with chemoradiotherapy in bladder - preserving treatment for MIBC patients who are ineligible for or decline radical cystectomy. The main questions it aims to answer are:

Does nimotuzumab combined with radiotherapy reduce adverse events in elderly bladder cancer patients? Does this combination improve objective response rate (ORR), progression - free survival (PFS), overall survival (OS), and bladder preservation rate in these patients? Participants will be MIBC patients treated with nimotuzumab and chemoradiotherapy, with a planned 5 - year follow - up to assess treatment efficacy and safety.