title: B-scan ultrasound: positive and negative contrast material evaluation of congenital urachal anomaly.
mesh_terms: D000009:Abdominal Muscles / Q000002:abnormalities* / Q000000981:diagnostic imaging; D002675:Child, Preschool; D000013:Congenital Abnormalities / Q000175:diagnosis / Q000000981:diagnostic imaging; D003560:Cysts / Q000151:congenital*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D011859:Radiography; D014463:Ultrasonography; D014497:Urachus; D001743:Urinary Bladder / Q000002:abnormalities* / Q000000981:diagnostic imaging