Inferior rib<unk>  can be associated with aortic coarctation (as a result of dilatation of intercostal arteries), superior vena caval obstruction, arteriovenous fistula, or following a Blalock Taussig shunt. Causes of inferior rib<unk>  by etiology: Arterial: aortic coarctation, aortic thrombosis, pulmonary-oligemia/arteriovenous malformation, Blalock Taussig shunt, Tetralogy of fallot (TOF), absent pulmonary artery and pulmonary stenosis. Venous: arteriovenous malformations of chest wall, superior vena cava or other central venous obstruction. Neurogenic: intercostal neuroma, Neurofibromatosis type 1, poliomyelitis. Osseous: hyperparathyroidism, thalassemia, Melnick–Needles syndrome. Other causes of superior rib<unk>  include: poliomyelitis, osteogenesis imperfecta, neurofibromatosis, Marfan's syndrome, collagen vascular disease, and hyperparathyroidism.
Notching of the ribs
Subcutaneous emphysema
Tracheobronchomegaly
Bronchophony
Abdominal thrusts
Mediastinal shift
Tracheal deviation
Pleural thickening