hydronephrosis congenital hydronephrosis COHD:4037874 Congenital hydronephrosis is a renal urinary disease characterized by distension and dilation of the renal pelvis and calyces secondary to various congenital obstructive malformations of the kidneys and urinary tract that can evolve to renal atrophy. Editor note: TODO check relationship to OMIM:143400 ICD10:Q62.0 ICD9:753.29 MONDO:0007741 MedDRA:10050975 NCIT:C102979 Orphanet:2190 SCTID:16297002 UMLS:C0266316 non-syndromic renal or urinary tract malformation