renal agenesis (disease) renal agenesis, unilateral ICD10:Q60.0 MONDO:0019636 MedDRA:10053624 NCIT:C101220 Orphanet:93100 UMLS:C0266294 Unilateral renal agenesis (URA) is a form of renal agenesis characterized by the complete absence of development of one kidney accompanied by an absent ureter. congenital single kidney congenital solitary kidney unilateral renal agenesis