Renal agenesis causes

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Associated anomalies or genetic syndromes in unilateral renal agenesis and bilateral renal agenesis

Some associated anomalies or genetic syndromes in unilateral renal agenesis (URA) and bilateral renal agenesis (BRA) include:

URA or BRA and Some Genetic Disorders   (Modified table from Ultrasound diagnosis of fetal renal abnormalities)
Syndrome	Gene
Acro–renal–ocular syndrome	SALL 4
Branchio–oto–renal syndrome	EYA1 SIX1
Ectrodactyly–ectodermal dysplasia–cleft syndrome	P63
Pallistere Hall syndrome	GLI3
Renal–coloboma syndrome	PAX2
Townes–Brocks syndrome	SALL1
Antley–Bixler syndrome	FGFR2
Fraser syndrome	FRAS1
Smith–Lemli-Opitz syndrome	DHCR7
Goltz–Gorlin syndrome	PORCN
Kallman syndrome	KAL1
Lenz microphthalmia	BCOR

Associated Anomalies in Unilateral Renal Agenesis
Associated CAKUT (congenital anomalies of the kidney and urinary tract)	32%
VUR	24%
PUV	1%
PUJO	6%
Duplex kidney	1%
Ureterocele	1%
Megaureter	7%
Urinary tract infection	30%
Associated extra-renal anomalies	31%
Female tract anomalies	11%

Extra-renal Anomalies Associated with URA   (Modified table from Congenital Unilateral Renal Agenesis: Prevalence, Prenatal Diagnosis, Associated Anomalies. Data from Two Birth-Defect Registries )
Type	Extra-renal anomalies
One system	Face   Dysmorphic Thorax   Diaphragmatic hernia Thoracic haemangioma Lung Congenital lung cyst Heart ASD VSD Skull, spine, and skeleton Dysraphism parieto-occipital Spina bifida Hemivertebra Coccygeal congenital fistula Radial agenesia Hexadactyly Club foot   Genital or urinary tract Hypospadias Epispadias Developmental ovarian cyst
Sequences	VACTERL Caudal regression Coelosomia Limb body wall complex   Sirenomelia
Genetic syndromes	Bardet-Biedel   CHARGE   Fanconi anemia Fraser Goldenhar (OAV)
Chromosomal anomalies	Triploidy Trisomy 18 Trisomy 9
Non-identified polymalformative syndromes	Macrocephaly, hypertelorism
	Anencephaly, caudal regression
	Occipital meningoencephalocele, unicornate uterus
	Heart defect, limb anomaly
	Tetralogy of Fallot, radial agenesia
	Patent ductus arteriosus, cerebellum hypoplasia, supernumerary hemivertebra, tracheolaryngomalacia, Meckel’s diverticulum, agenesis of eyelashes
	Common arterial trunk, ambiguous genitalia, imperforate anus, cystic hygroma
	Dandy-Walker, VSD
	Radial agenesia, clubhand, hypoplastic left heart syndrome, transposition of great vessels, agenesis of lung, diaphragmatic hernia, polysplenia
	Spina bifida, stenosis of anus
	Vertebral dysplasia, scrotal hypospadias
	Imperforate anus, ambiguous genitalia