This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Aortic Imaging, Subject name: Radiology
[{'content': 'Inferior rib notching is seen in - \nSelect and explain. \nA. Coarctation of aorta, B. SLE, C. RA, D. Scleroderma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is \'a\' i.e., Coarctation of aorta Rib notchingo "Rib notches" are peripheral, sharply circumscribed osteolytic lesion on superior or inferior surface of ribs,o Causes of rib notching ae : -Inferior surfaceArterialCoarctation of aortaBilateral Rib notching is seen on the lower border of 3rd to 8th ribs. Rib notching is absent in the 1st & 2nd ribs. Rib notching is usually present after the age of 7 years.Aortic thrombosis (aortic obstruction) or aortitis.Subclavian obstruction after Blalock operation for Fallot\'s tetralogy (Taussig Blalock operation.Pulmonary oligemiaPulmonary\' atresia, TOF, absent pulmonary artery.Venous : - SVC obstructionArteriovenous: - Pulmonary arteriovenous malformation, chest wall arteriovenous malformation.Neurogenic: - Neurofibromatosis.Superior surfaceConnective tissue diseases : - SLE, Scleroderma, RA, Sjogren\'s syndrome.Metabolic : - HyperparathyroidismMiscellaneous : Neurofibromatosis, Restrictive lung disease, Poliomyelitis, Marfan\'s syndrome, progeria. Osteogenesis imperfecta.', 'role': 'assistant'}]