Final answer:
Transposition of the great vessels presents on an X-ray as the reversed positioning of the major blood vessels, with the aorta and pulmonary artery arising from the incorrect ventricles.
Step-by-step explanation:
On an X-ray, transposition of the great vessels typically appears as reversed positioning of major blood vessels. This congenital heart defect involves the aorta arising from the right ventricle and the pulmonary artery arising from the left ventricle, which is the opposite of their normal positions. This condition does not necessarily cause an enlarged heart silhouette, narrowed airways, or distorted bone structure. Instead, the reversal of the major vessels can be identified, potentially alongside other radiologic indications of structural heart disease.