Aortopulmonary septal defect (aorto-pulmonary window)
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A relatively large (2.5 cm in AP dimension) aorta-pulmonary window is seen connecting the ascending aorta (about 1.8 cm superior to the aortic annulus) and main pulmonary artery.
The aorta is seen arising from the left ventricle.
The pulmonary trunk measures 2.1 cm in short diameter.
The right pulmonary artery measures 1.5 cm in diameter.
The left pulmonary artery measures 1.2 cm in diameter.
The ascending aorta measures 2.2 cm in diameter.
No evidence of anomalous pulmonary venous drainage.
Dilated left heart chambers.
Normal drainage of superior vena cava and inferior vena cava is noted to the right atrium.
Mosaic attenuation in the lungs likely due to pulmonary plethora.
Increased pulmonary vascularity.
Prominent mediastinal lymph nodes.
Patchy opacity in the lingula (infectious)
A typical case of aortopulmonary window is presented.