title: Posterior urethral valves in identical twins.
mesh_terms: D000293:Adolescent; D004200:Diseases in Twins; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D011247:Pregnancy; D014430:Twins, Monozygotic; D014521:Urethra / Q000002:abnormalities*