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megacalycosis
Etiology:
- malformation of the renal papillae
Pathology:
- enlargement of the renal calyces without urinary tract obstruction or vesicoureteral reflux
- malformation of the renal medulla
- short collecting ducts
- number of calyces is increased.
- mild impairment of maximum urine concentration capacity
Clinical manifestations:
- generally asymptomatic
Radiology:
- intravenous urography:
- enlargement of the pyelocalyceal system
- increased number of calyces
- dilatation of the renal pelvis is not present
- ureter is slim
- voiding cysturethrography
- vesicoureteral reflux is not present
- renal scintigraphy
- normal renal function
- prompt washout of the radionuclide
Management:
- no specific treatment necessary
General
kidney disease; renal disease
References
- Megacalycosis
http://www.urology-textbook.com/megacalycosis.html