2Ohgaki M,Higuchi A,Chou H,et al.Acute peritonitis caused by intraperitoneal rupture of an infected urachal cyst:report of a case.Surg Today,2003,33(1):75-77.
3Boyle G,Rosenberg HK,O'Neill J.An unusual presentation of an infected urachal cyst.Review of urachal anomalies.Clin pediatr (phila),1988,27(3):130-134.