title: The cobra head sign.
authors.affiliation: Department of Radiology, Wake Forest Baptist Medical Center, Wake Forest University School of Medicine, Medical Center Blvd, Winston-Salem, NC, 27157, USA, ptirman@wakehealth.edu.
authors.forename: Philippe A
authors.initials: PA
authors.lastname: Tirman
authors.forename: Raymond B
authors.initials: RB
authors.lastname: Dyer
mesh_terms: D006801:Humans; D014057:Tomography, X-Ray Computed; D014513:Ureter / Q000000981:diagnostic imaging; D014518:Ureterocele / Q000000981:diagnostic imaging*; D001743:Urinary Bladder / Q000000981:diagnostic imaging / Q000473:pathology