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*May be unilateral or involve only part of a kidney.<ref name=Ref_Klatt237>{{Ref Klatt|237}}</ref> | *May be unilateral or involve only part of a kidney.<ref name=Ref_Klatt237>{{Ref Klatt|237}}</ref> | ||
Etiology: | Etiology: | ||
*Renal collecting system forms when ''ureteric bud'' (which grows from cloaca) meets the ''renal blastema'' (kidney parenchyma precursor). | *Embryological malformation:<ref name=pmid33252759/> | ||
**Renal collecting system forms when ''ureteric bud'' (which grows from cloaca) meets the ''renal blastema'' (kidney parenchyma precursor). | |||
==Gross== | ==Gross== |
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