CASES OF ECHIXOCOCCI. 163 



The direction in which the perforation takes place 

 varies considerably. Davaine has collected a number 

 of cases scattered through the records of medicine, with 

 something like the following results, viz. : 



The echinococci bulged into the thorax in 4 cases. 



opened into the pleural 



cavity ... ... 9 



opened into the base of 

 the lung, or into the 

 bronchi 21 



communicating with the 



bile-ducts ... ... 8 



bursting into the abdo- 



minal cavity ... 8 



bursting into stomach 



or intestine ... 22 



not extending beyond 



the liver 94 



166 



Frerichs gives us the records of 23 cases which have 

 come under his immediate observation, viz., 



3 Extended into the right side of the chest. 



1 Into the base of the right lung, where it gave rise 



to a large abscess. 

 1 Opened into the bronchi. 



1 intestinal canal. 



2 abdominal cavity. 



1 Opened externally through the umbilicus. 



