USMLE STEP 3 MCQ 14 : What is the most likely diagnosis?
on Wednesday, January 26, 2011
 a) Ventricular septal defect b) Patent ductus arteriosus c) Coarctation of aorta d) Supravalvular aortic stenosis e) Pulmonary valve stenosis Correct Answer: C Explanation: PA chest radiograph demonstrates rib notching/erosion of ribs 5-8 bilaterally (secondary to intercostal collateral development). There is cardiomegaly, figure-three sign in the left upper mediastinum and post-stenotic dilation of the descending aorta
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Labels: USMLE step 03