Z Chen, X Chen, ZH Wu, YC Luo… - … of Laparoendoscopic & …, 2011 - liebertonline.com ... R etrocavalureter (RCU), also known as circumcaval ureter, is a rare congenital anomaly of the inferior vena cava (IVC) with an approximate incidence of 1 in 1000 and becomes symptomatic in the third or fourth decade of life. ...