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Presurgical contrast enhanced CT scan demonstrating a marked narrowing of descending thoracic aorta at the level of where the ligamentum arteriosum inserts into the descending aorta and is distal to the left subclavian artery keeping with the infantile(pre-ductal) form of aortic coarctation. There are also a prominent dilatation and tortuosity of internal thoracic posterior, anterior intercostal, musculophrenic and superior epigastric arteries.