Nat. Rev. Urol. doi:10.1038/nrurol.2017.16 Figure 1 Classification of patients with high-risk NMIBC after intravesical BCG and types of BCG failure Figure 1 | Classification of patients with high-risk NMIBC after intravesical BCG and types of BCG failure. Distinct categories of clinical responses to BCG are determined by treatment duration/sequence, clinical response, and timing of clinical response, which are represented in the flowchart. CIS, carcinoma in situ; NMIBC, non-muscle-invasive bladder cancer; TUR, transurethral resection. Kamat, A. M. et al. (2017) BCG-unresponsive non-muscle-invasive bladder cancer: recommendations from the IBCG Nat. Rev. Urol. doi:10.1038/nrurol.2017.16