Additional pediatric resources: GeneralPediatrics.com | PediatricEducation.org | SearchingPediatrics.com
Michael P. D'Alessandro, M.D.
Peer Review Status: Internally Peer Reviewed
Etiology/Pathophysiology:
A congenital malformation resulting in direct intrapulmonary
connections between the pulmonary arteries and veins without an
intervening capillary bed. This causes a right to left shunt with
peripheral arterial oxygen desaturation. Brain abscesses can develop
due to lack of pulmonary capillary filtration of microorganisms.
Pathology:
Not applicable
Imaging Findings:
Sixty-five percent are single, 75% are unilateral, and 60% are in the
lower lobes usually right beneath the visceral pleura. On CXR a soft
tissue mass is seen in the lung that may have tubular densities (vein
and artery) connecting it to the hilum. Pulmonary angiography is
diagnostic and is used to define the number, size and location of the
fistulae.
DDX:
References:
See References Chapter.
Additional pediatric resources: GeneralPediatrics.com | PediatricEducation.org | SearchingPediatrics.com
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