title: Editor's second case quiz.
authors.affiliation: Department of Radiology, Red Cross Children's Hospital, South Africa.
authors.forename: B J
authors.initials: BJ
authors.lastname: Cremin
mesh_terms: D005260:Female; D005315:Fetal Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D006869:Hydronephrosis / Q000000981:diagnostic imaging; D008297:Male; D011247:Pregnancy; D009626:Terminology as Topic; D016216:Ultrasonography, Prenatal; D014521:Urethra / Q000002:abnormalities*; D001743:Urinary Bladder / Q000000981:diagnostic imaging