[Congenital megaureter (MU) in the adult. A series of 55 patients presenting 64 megaureters].

Analysis of series of 64 instances of MU in 55 patients leads the authors to the following conclusions: --MU is fairly rare in adults since it is usually discovered at an earlier age; --adult MU shows little activity, even when it is complicated by lithiasis; --renal involvement frequently bears no strict relationship to the magnitude of the MU and is not always obviously improved by surgery; --surgical treatment of MU (anti-reflux ureterovesical reimplantation, with or without ureteral modelling) gives reliable results (14 successes, 2 failures, and 1 patient lost to follow up), comparable to those obtained in children); --the main operating indications consist of: infection, associated urinary, youth, and the possibility of pregnancy; --the problem of associated lithiasis must be dealt with before or during surgical treatment of MU, never after, because of the risk of postoperative lithic migration. Treatment of associated lithiasis has been appreciably simplified by endoscopic methods, and particularly by extracorporeal litholapaxy.