340 CLINICAL APPLIED ANATOMY. 



oesophagus are believed to be initiated by disease of these glands. 

 The inflamed glands have been known to perforate any of the 

 following structures, which are in close relation with them : 

 trachea, main bronchi, oesophagus, pericardium, aorta, pulmonary 

 artery, pulmonary vein, or thoracic duct. They may produce 

 chronic mediastinal suppuration. By opening in two directions 

 they have given rise to communications between the oesophagus 

 and the air tubes, or the air tubes and the mediastinum. 



