Truncus arteriosus

Truncus arteriosus (TA) is a rare congenital cardiovascular anomaly characterized by a single arterial trunk arising from the heart by means of a single semilunar valve (<I>i.e.</I> truncal valve). Pulmonary arteries originate from the common arterial trunk distal to the coronary arteries and proximal to the first brachiocephalic branch of the aortic arch. TA typically overrides a large outlet ventricular septal defect (VSD). The intracardiac anatomy usually displays situs solitus and atrioventricular (AV) concordance.

Increased nuchal translucency

The presence of an abnormally large hypoechoic space in the posterior fetal neck (usually detected on prenatal ultrasound examination).

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PMID (PMCID)
11982988	FEMALE	Adult
	Prenatal diagnosis of 22q11 microdeletion in an early second-trimester fetus with conotruncal anomaly presenting with increased nuchal translucency and bilateral intracardiac echogenic foci.
	Machlitt A, Tennstedt C, Korner H, Bommer C, Chaoui R. Ultrasound Obstet Gynecol. 2002;19(5):510-3.
	We report on a 16-week fetus, in which detection of increased nuchal translucency thickness and bilateral intracardiac echogenic foci led to the prenatal diagnosis of truncus arteriosus communis, interruption of the aortic arch and aplastic thymus.