Clinical data: Patient diagnosed with common arterial trunk, submitted to pulmonary artery banding in another center and lost to clinical follow-up. Referred to our center at four years old, extremely cyanotic. Chest radiography: Cardiomegaly; attenuated peripheral vascular markings. Electrocardiography: Right ventricular hypertrophy. Echocardiography: Common arterial trunk, but it was not possible to analyze all the structures. Computed tomography angiography: Van Praagh type A4 common arterial trunk. Extremely hypoplastic right and left pulmonary arteries.
Diagnosis: Association of aortic arch interruption type A is uncommon and should be considered.
Operation: Debanding of pulmonary arteries allowing for possible future complete repair.
Keywords: Aortic Coarctation; Cyanosis; Heart Defects, Congenital; Infant, Newborn; Truncus Arteriosus.