Editorial Comment to Rare case of carcinoma in situ originated in right retrocaval ureter successfully managed with laparoscopic procedure

摘要

Retrocaval ureter (RCU) is a rare congenital abnormality caused by impaired development of the inferior vena cava (IVC). The incidence of RCU has been estimated at around 0.1%.1 Furthermore, RCU with a urothelial malignancy is very rare, with only 20 cases described in the literature.2 Noda et al. reported carcinoma in situ (CIS) originating in the right RCU that was successfully managed with a laparoscopic procedure.3