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notching of the ribs
Notching of the ribs (or rib notching) is a radiologic sign where the surface of the rib is deformed. It can be characterized as unilateral or bilateral, and should be differentiated between affecting the upper (superior) or lower (inferior) surface of the rib.
Inferior rib notching can be associated with aortic coarctation (as a result of dilatation of intercostal arteries〔(LearningRadiology.com > Coarctation Of the Aorta ) Retrieved August 2010〕), superior vena caval obstruction, arteriovenous fistula, or following a Blalock Taussig shunt
Causes of inferior rib notching by etiology:
''Arterial'': aortic coarctation, aortic thrombosis, pulmonary-oligemia/AV malformation, Blalock Taussig shunt, Tetralogy of fallot (TOF), absent pulmonary artery and pulmonary stenosis.
''Venous'': AV malfomations of chest wall, superior vena cava or other central venous obstruction.
''Neurogenic'': intercostal neuroma, Neurofibromatosis type 1, poliomyelitis.
''Osseous'': hyperparathyroidism, thalassemia, Melnick–Needles syndrome.
Potential causes of superior rib notching include: poliomyelitis, osteogenesis imperfecta, neurofibromatosis, Marfan's syndrome, collagen vascular disease, and hyperparathyroidism.
==References==
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