The small kidney.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D005919:Glomerular Filtration Rate; D006801:Humans; D007668:Kidney / Q000002:abnormalities* / Q000601:surgery; D007677:Kidney Function Tests; D014718:Vesico-Ureteral Reflux / Q000175:diagnosis