Low-grade non-muscle-invasive bladder cancer: molecular landscape, treatment strategies and emerging therapies

Abstract

Low-grade non-muscle invasive bladder cancer is a specific category of bladder cancer with a favourable prognosis; however, its management presents several challenges. The risk of stage progression is very low, but approximately half of patients will experience recurrence within the first 5 years after diagnosis. This high propensity for recurrence, coupled with the threat of progression, mandates ongoing surveillance. However, the optimal frequency and duration of follow-up monitoring remain undefined. Current management strategies for low-grade non-muscle invasive bladder cancer rely heavily on routine office cystoscopy, with few advances in diagnostic and treatment options over the past 25 years. Our basic understanding of disease biology has substantially advanced. However, at present, considerable variations in clinical practice exist, with implications for increased financial and treatment burden for patients and health care systems. Molecular signatures and biomarker discoveries are crucial to understand disease behaviour and inform novel treatment strategies. Emerging therapies, such as advanced drug-delivery systems, immunomodulatory agents and targeted therapies, offer the potential to improve patient outcomes, streamline management and reduce the need for surveillance cystoscopies. Actionable avenues for future research in the field include prospective validation of novel biomarkers and therapies with the ultimate aim of optimizing patient care and reducing health care costs.