Table 2.

Common arterial trunk (n = 23): associated clinical findings detectable at prenatal ultrasound examination in relation to the presence and type of chromosomal anomalies

	Cases with 22q11 microdeletion	Cases with aneuploidy	Other cases
Additional aortic arch anomalies	4/6*	0/2	2/15†
Fetal growth restriction	2/6	2/2	1/15
Thymus hypo- or aplasia	5/5		1/9‡
Extracardiac anomalies	4/6	2/2	4/15

*In one case aberrant right subclavian artery was not diagnosed at prenatal ultrasound examination.

†Both cases not recognised at prenatal ultrasound examination.

‡In one case thymus could not be assessed (case 14); one case (20) resulted false positive at necropsy.