Truncus arteriosus
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failure of embryologic truncus arteriosus to septate into aorta and pulmonary artery
truncal valve may have 2, 3, or 4 cusps
subtypes are based on truncus origin of pulmonary arteries
VSD is often present
early cyanosis with extensive mixing of blood
requires early surgical correction to prevent pulmonary hypertension
diagram of truncus arteriosus
the truncus is a single vessel coming off right above a VSD
later, this gives rises to the aorta and the pulmonary arteries
gross specimen: truncus arteriosus
pulmonary arteries and aorta share a common trunk, the truncus arteriosus
truncal structure is seen between the arrows
truncus valve can’t be seen in this view
Category: Pathology Notes
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