Which of the following causes BOTH superior and inferior rib-notching in a chest radiograph?: (A) NF-1, (B) Blalock Taussig shunt, (C) SVC occlusion, (D) Coarctation of aoa
Answer is A. Superior rib notching -Polio -Restrictive lung disease -Neurofibromatosis -Connective tissue disease -Osteogenesis imperfecta Inferior rib notching -Thrombosis of aoa -Coarctation of aoa -Blalock Taussig shunt -Occlusion of subclan aery -Pulmonary AV malformation Both Superior and inferior rib notching -NF-1 -Hyperparathyroidism