Table I.

Cases coded as BA but excluded because of chromosome abnormalities/malformation syndromes

BPA Codes	Chromosome abnormality, Mendelian syndrome, malformation complex	N
753.xxx	Congenital Anomalies of Urinary System Polycystic kidneys, infantile type Autosomal recessive polycystic kidney disease (ARPKD)	<5
758.xxx	Chromosomal Anomalies Translocation trisomy - duplication of a 21 Down syndrome, NOS Malrotation of small intestine alone Annular pancreas Other specified anomalies of autosomes, NOS	5
759.xxx	Other and Unspecified Congenital Anomalies Congenital malformation syndromes affecting facial appearance Congenital malformation syndromes involving limbs Congenital malformation syndromes with metabolic disturbances Other specified anomalies (Acrocallosal syndrome; Aicardi syndrome; Angelman syndrome; Bloom syndrome; Cardio-splenic syndrome; Cerebro-oculo-facial-skeletal syndrome; CHARGE association COFS syndrome; FG syndrome; Fukuyama congenital muscular dystrophy; Hemihypertrophy Jadassohn-Lewandasky syndrome; Meckel-Gruber syndrome; Muscle-eye-brain disease; Myotonic dystrophy; Neu-Laxova syndrome; Norrie disease; Oeis syndrome; Pentalogy of Cantrell; PHACE syndrome Proteus syndrome; Sotos syndrome; Townes-Brock syndrome; Twin reversed arterial perfusion sequence; VACTERL association; VATER association; Weaver syndrome)	9