Diploma thesis title: to determine the extent to which the COVID-19 pandemic has impacted the treatment of muscle-invasive bladder cancer at the Clinical Hospital Center Rijeka. It was anticipated that movement restrictions, fear of infection in healthcare facilities, and healthcare system overload would result in delays in seeking medical assistance. Participants and Methods: data were collected through the Hospital Information System (HIS), reviewing the pathological findings of patients undergoing radical cystectomy in 2018 and 2021 at the Clinic for Urology and the Clinical Department for Pathology and Cytology of the Clinical Hospital Center Rijeka. Results: there was no statistically significant difference in the gender (p=0.07) and age structure (p=0.126), nor in tumor localization and size. Additionally, there was no statistically significant difference in the number of TURBT procedures per month (p=0.423) or in the comparison of T1 and T2 stage samples obtained by TURBT. There was no statistically significant difference in the distribution of the number of cystectomies per month (p=0.171). According to the Mann-Whitney test, there was a significant difference in the average number of days between TURBT and cystectomy in 2018 and 2021 (p=0.0123). Statistical analysis revealed no significant difference in definitive pathology (T) between 2018 and 2021 (p=0.740), and the distribution of patients based on definitive pathology (N) was also not statistically significant (p=0.299). Conclusions: the pandemic significantly affected only the number of days between TURBT and radical cystectomy, but not the final diagnosis itself.