Cyanosis since birth. Known case of truncus arteriosus.
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There is cardiomegaly.
Lungs are hyperinflated with increased pulmonary vascularity.
Right-sided aortic arch is demonstrated.
This is a chest radiograph of a patient with truncus arteriosus type I. The diagnosis was confirmed on echocardiography. Truncus arteriosus is a common differential diagnosis in chest radiographs of cyanotic patients presenting with cardiomegaly, pulmonary plethora and right-sided aortic arch.