Patients with muscle-invasive bladder cancer are often older and multimorbid, thus in an increased risk of perioperative mortality and morbidity in relation to radical cystectomy (RC). The aim of the study is to investigate the effect of perioperative Comprehensive Geriatric Assessment (CGA) and tailored intervention in older, frail patients with bladder cancer undergoing RC.

Patients will be randomized 1:1 and allocated into either control or intervention study arm. The control group will receive perioperative "care as usual" according to exciting principles and guidelines. The intervention will comprise a preoperative, thorough geriatric, multidisciplinary assessment, focused on optimizing health issues of expected importance in further course of surgery. Furthermore, postoperative ward rounds by a geriatric team will be conducted. Thus, the course of treatment for each patient will be a close interdisciplinary collaboration.

Inclusion Criteria:

1. Patients with muscle-invasive bladder cancer and scheduled radical cystectomy.
2. Planned urinary diversion with an ileal conduit
3. Age ≥ 65 years.
4. Patients considered frail by G8 screening tool (total score ≤14).

Exclusion Criteria:

1. Patients who refuse or are not able to provide informed consent.
2. Patients who do not speak or understand Danish.
3. Planned concomitant nephroureterectomy or other major surgical intervention at the same time as RC