[Expert consensus on intravesical therapy for non-muscle invasive bladder cancer (2021 edition)].

Bladder cancer is one of the common malignant tumors in China, with 75% of bladder cancer being non-muscle invasion with a high recurrence rate after surgery. Intravesical therapy is an useful methods to either directly kill tumor cells by infusing cytotoxic drugs into the bladder or directly or indirectly induce local immune responses of the body through infusing immune agents, such as bacillus calmette guerin, and thus reduce the risk of tumor recurrence and progression. In 2019, the Urological Chinese Oncology Group issued the "Expert consensus on intravesical therapy on non-muscle invasive bladder cancer" . Recently, great progress in the clinical diagnosis and treatment of non-muscle invasive bladder cancer has been achieved domestically and abroad, including the risk assessment of non-muscle invasive bladder cancer, the therapeutic choice of intravesical drugs, the adverse reactions and treatment experience of intravesical therapy, and clinical research on new types of intravesical drugs. This consensus is made according to domestic and overseas evidence-based medicine in combination with current clinical practice and experience of intravesical therapy for non-muscle invasive bladder cancer in China. It is an update of the 2019 expert consensus, with the wish to provide a guidance for domestic clinical standardized intravesical therapy for non-muscle invasive bladder cancer.膀胱癌是我国居民常见的恶性肿瘤之一，临床上75%的膀胱癌为非肌层浸润性膀胱癌，术后复发率高。膀胱灌注治疗是向膀胱内注入细胞毒性药物直接杀伤肿瘤细胞，或注入免疫制剂如卡介苗等直接或间接诱导体内发生局部免疫反应，从而降低肿瘤复发和进展的风险。2019年中国肿瘤医院泌尿肿瘤协作组发布了非肌层浸润性膀胱癌膀胱灌注治疗专家共识。近年来，国内外非肌层浸润性膀胱癌的临床诊治有了较大进展，包括非肌层浸润性膀胱癌的危险度评估，膀胱灌注药物的选择，膀胱灌注的不良反应及处理经验以及新型膀胱灌注药物的临床研究等。共识根据国内外循证医学证据，结合目前国内非肌层浸润性膀胱癌膀胱灌注治疗的临床实践和应用经验，在2019版专家共识的基础上进行了相应的探讨和更新，以期对目前国内非肌层浸润性膀胱癌膀胱灌注的临床规范化治疗提供一定指导意见。.