<unk>  (Sibson hernia) is a protrusion of<unk>  outside of thoracic wall. In 20% patients with<unk> , the incidence is congenital. In 80% of the cases, the hernia is noted after chest trauma, thoracic surgery or certain pulmonary diseases. Congenital hernia occurs because of the weakness of the suprapleural membrane or neck muscles. In pulmonary diseases such as asthma, frequent coughing can lead to high intra thoracic pressure, causing the<unk>  to herniate out.<unk>  may occur near the neck (cervical), between the ribs (intercostal), near the vertebrae (paravertebral) or near the sternum (parasternal).
Lung hernia
Diaphragmatic hernia
Bronchocele
Subphrenic abscess
Tracheal tumor
Tracheoinnominate fistula
Chylothorax
Tracheal deviation