diagnosis is established by an intravenous pyelogram demonstrating an abnormally shaped excretory system with longer than usual ureters , which also helps to differentiate it from other posterior mediastinal tumors , such as neurogenic masses , including neuroblastoma , ganglioneuroma , neurofibroma , neuroenteric cysts , meningoceles and hernia of the foramen of bochdalek .
C0027651
tumors
C0577559
masses