[A Case of Robot-Assisted Radical Cystoprostatectomy for Locally Advanced Prostate Cancer with Bladder Infiltration].

While robot-assisted radical cystoprostatectomy (RARC) for locally advanced prostate cancer (LAPC) may sometimes prove to be excessive treatment, it can significantly reduce the risk of positive surgical margins and lower urinary tract obstruction in some cases. Here, we report a case of LAPC treated with RARC in a patient with right hydronephrosis due to bladder infiltration and left hypoplastic kidney. A 71-year-old man presented with frequent urination in August 2019. Prostate-specific antigen (PSA) level was 8.633 ng/ml, and magnetic resonance imaging led to the suspicion that the prostate cancer extended beyond the prostate capsule without distant metastasis. Prostatic biopsy revealed Gleason score 10 (5＋5) adenocarcinoma in 8 out of 8 specimens. We diagnosed left hypoplastic kidney and LAPC with right hydronephrosis due to bladder infiltration. We performed percutaneous right nephrostomy and started neoadjuvant hormone therapy. RARC and intracorporeal ileal conduit were performed in March 2020. The prostate was adherent to the anterior surface of the rectum and was difficult to remove. At present, five months after the surgery, the patient remains free of recurrence and metastasis with PSA level ＜0.003 ng/ml. RARC for LAPC with bladder infiltration can be an effective therapeutic strategy in some cases.