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[Congenital megacalyces].

C P Shieh1, K Y Lin, Y W Li

  • 1Department of Pediatrics, Taipei Municipial Women and Children's Hospital; Taiwan, R.O.C.

Zhonghua Minguo Xiao Er Ke Yi Xue Hui Za Zhi [Journal]. Zhonghua Minguo Xiao Er Ke Yi Xue Hui
|July 1, 1990
PubMed
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Congenital megacalyces, a non-obstructive kidney anomaly, presents as calyceal dilatations. Early detection via sonography is key, as this condition is non-progressive and often asymptomatic, avoiding unnecessary interventions.

Area of Science:

  • Pediatric Nephrology
  • Radiology
  • Urology

Background:

  • Congenital megacalyces is a calyceal anomaly with non-obstructive dilatations.
  • It is associated with hypoplasia of the medullary pyramids.
  • This condition is often incidentally discovered during renal imaging.

Purpose of the Study:

  • To describe the clinical and radiological features of congenital megacalyces.
  • To emphasize the role of sonography in diagnosis and follow-up.
  • To highlight the non-progressive nature of the condition to prevent unnecessary interventions.

Main Methods:

  • Retrospective review of seven patients diagnosed with congenital megacalyces over three years.
  • Initial detection by renal sonography.
  • Confirmation and characterization using intravenous urography, ultrasound, diuretic radionuclide renogram, and radionuclide cystography.

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Main Results:

  • Seven cases (5 boys, 2 girls) aged 7-14 years were identified.
  • Most patients were asymptomatic, with one case of hematuria.
  • Radiological findings included calyceal dilatation, flattened papillae, thin medulla, and normal-sized renal pelvis/ureter; radionuclide studies confirmed non-obstructive lesions and no reflux.

Conclusions:

  • Congenital megacalyces is a non-progressive condition.
  • Sonography is effective for initial diagnosis and long-term monitoring.
  • Accurate diagnosis is crucial to avoid unnecessary surgical procedures.