CESTODA 133 



Hospital displays several good hydatid preparations, the entire 

 series representing at least twenty-two separate cases. Of 

 these, fifteen are referable to the liver, that is, if we include Dr 

 Dickinson's case, already published, where hydatids were found 

 within the hepatic duct. There are two renal cases ; also one 

 from the brain (Dr Dickinson's case), and another where an 

 hydatid was expectorated. Besides these, there are three other 

 highly characteristic examples of echinococcus disease affecting 

 the region of the neck, breast, and axilla respectively. 



The museum of the London Hospital Medical School contains 

 a large collection of parasites. Out of fifty-seven preparations 

 of entozoa, I found twenty-two referable to hydatids ; and, so 

 far as I could gather, all of them belonged to different cases. 

 Only one case seems to have been published in detail. This, 

 though a very old preparation, is a fine example of an hydatid, 

 nearly three inches in length, occupying one of the cerebral 

 hemispheres ( f Edinb. Med. Journ./ vol. xv). There is a second 

 brain case, where the vesicles were of small size, but very 

 numerous. Of the other twenty cases, fourteen belong to the 

 liver, two to the spleen, one to the lung, one to the uterus ; 

 one being a very large hydatid of doubtful seat, and another 

 being referable to the lumbar region, where it formed a tumour 

 containing ff a large number of small hydatids/' Amongst the 

 more remarkable specimens is that described in the MS. cata- 

 logue as "a true hydatid cyst developed in connection with the 

 broad ligament." This preparation, unique of its kind, shows 

 no trace of the ovary, which, indeed, seems to have disappeared 

 altogether. One of the liver cases should rather be classed as 

 abdominal, since the large cyst is situated between the dia- 

 phragm and liver, pressing upon the latter organ below and also 

 upon the lung above, but apparently not involving either of 

 these viscera structurally. Another very striking case is that 

 in which there is an external opening communicating with the 

 cyst in the liver, and an internal opening through the dia- 

 phragm communicating with the lungs and bronchial tubes. 

 The patient had actually coughed up liver hydatids by the 

 mouth, and had passed others through the right wall of his 

 abdomen. There is another liver case in which the hydatids, 

 in place of escaping externally, had gained access to the inferior 

 cava; and if I understand the MS. record rightly, in the same 

 patient a second hydatid communicated with the portal vein, 

 and a third with the hepatic vein. Lastly, I must add that 



