title: THE NATURAL HISTORY OF PRIMARY PELVIC HYDRONEPHROSIS.
mesh_terms: D000293:Adolescent; D002648:Child; D000013:Congenital Abnormalities; D005853:Geriatrics; D006801:Humans; D006869:Hydronephrosis; D007223:Infant; D007231:Infant, Newborn; D007669:Kidney Calculi; D007674:Kidney Diseases; D007680:Kidney Neoplasms; D010388:Pelvis; D013223:Statistics as Topic; D014513:Ureter; D014517:Ureteral Obstruction; D014518:Ureterocele
keywords: ABNORMALITIES; ADOLESCENCE; CHILD; GERIATRICS; HYDRONEPHROSIS; INFANT; INFANT, NEWBORN; KIDNEY CALCULI; KIDNEY DISEASES; KIDNEY NEOPLASMS; STATISTICS; URETER; URETERAL OBSTRUCTION; URETEROCELE