PNEUMOTHORAX 153 



Animals in this condition generally die rapidly, although we may 

 find rare cases where recovery takes place by an absorption of the air, or 

 is followed by the accumulation of a fluid (pneumohydrothorax) which 

 itself in turn becomes rapidly absorbed. The treatment consists in the 

 administration of camphor or alcoholic stimulants and in tapping the 

 chest wall. 



Hematothorax. — In consequence of the destruction of some large 

 vessel or vessels in the lungs or the pleural cavity or from the presence 

 of growths we find extensive hemorrhage into the thoracic cavity. The 

 physical symptoms are similar to those of other pleural exudates, but 

 this condition comes on very rapidly and in this condition the mucous 

 membranes become very pale. When the symptoms are not pronounced 

 the operation of puncture will determine the condition positively. Nor- 

 mal hemorrhages are easily and quickly absorbed, but often where there 

 is great dyspnoea, puncture of the chest wall is always advisable. 



Other Pathological Conditions of the Pleura. 



Besides tubercular deposits we find endothelial papillomas which are 

 seen in the form of velvety or grape-like formations on both sides of the 

 mediastinal coats of the pleura and on the pleuritic coat of the diaph- 

 ragm. These formations frequently cause a low form of chronic pleuri- 

 tis (Kitt). The writer has observed an intrathoracic chondroma of 

 great size, which was attached to the ribs, filling up the left thoracic 

 side and pushing the left lung and heart to the right side. There was 

 severe dyspnoea and anasarca. 



