Renal dysplasia and urethral valves.
D002648:Child; D002675:Child, Preschool; D004200:Diseases in Twins; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007668:Kidney / Q000002:abnormalities*; D008297:Male; D014521:Urethra / Q000002:abnormalities*