title: Follow-up of unilateral multicystic kidney dysplasia after prenatal diagnosis.
abstract: OBJECTIVE
  Since the introduction of antenatal diagnostic screening, multicystic kidney dysplasia (MCKD) has been diagnosed in 1 of 4300 live births. We analyze our own experience and demonstrate a management regime based on these results and existing studies.
  
  
  METHODS
  Retrospective data analysis was carried out in 110 patients, prenatally diagnosed with MCDK. A total of 93 patients with confirmed diagnosis of unilateral MCDK were born alive and followed up in our institutions.
  
  
  RESULTS
  A total of 110 unilateral cystic kidneys were prenatally diagnosed; 93 were confirmed postnatally. These children were retrospectively allocated to two treatment groups: 51 were operated upon; 42 were treated conservatively. A micturition cystourethrogram was performed 88 times, yielding 20 pathological findings. Vesicoureteral reflux was identified 11 times (12.5%). Eleven children (12%) had associated non-urological abnormalities. Cardiac and musculoskeletal malformations predominated. After 1995, nephrectomy was performed only when clinically indicated. Thirty-seven children were treated conservatively for between 4 months and 6 years (mean 33 months); 28 dysplastic kidneys exhibited size reduction. Complete involution was noted in 16 of 28 children between 7 and 29 months (mean 16.2 months).
  
  
  CONCLUSIONS
  This study provides evidence that neonatal nephrectomy of unilateral MCDK is rarely required. It also shows that the discussed malformation is not an isolated developmental abnormality. In a high proportion, associated urogenital abnormalities were present and therapeutically relevant, and determined the overall prognosis.
authors.affiliation: Klinik und Poliklinik for Kinderchirurgie, der Medizinischen Fakultät (Charité) der Humboldt--Universität zu Berlin, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Eckoldt
authors.forename: R
authors.initials: R
authors.lastname: Woderich
authors.forename: S
authors.initials: S
authors.lastname: Wolke
authors.forename: K S
authors.initials: KS
authors.lastname: Heling
authors.forename: B
authors.initials: B
authors.lastname: Stöver
authors.forename: C
authors.initials: C
authors.lastname: Tennstedt
mesh_terms: D000015:Abnormalities, Multiple; D001794:Blood Pressure / Q000502:physiology; D002648:Child; D002675:Child, Preschool; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis*; D005500:Follow-Up Studies; D006801:Humans; D006869:Hydronephrosis / Q000150:complications; D007223:Infant; D007231:Infant, Newborn; D007677:Kidney Function Tests; D021782:Multicystic Dysplastic Kidney / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology / Q000628:therapy; D011247:Pregnancy; D011296:Prenatal Diagnosis; D012189:Retrospective Studies; D014515:Ureteral Diseases / Q000150:complications; D014552:Urinary Tract Infections / Q000150:complications; D014718:Vesico-Ureteral Reflux / Q000150:complications