<unk> 's crunch is caused by pneumomediastinum or pneumopericardium, and is associated with tracheobronchial injury due to trauma, medical procedures (e.g., bronchoscopy) or rupture of a proximal pulmonary bleb. It can be seen with Boerhaave syndrome.
Hamman's sign
Adson's sign
Louvel's sign
Bancroft's sign
Magnan's sign
Dance's sign
Dahl's sign
Salus's sign