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Scientific Proceedings (65). 



the entire colon in the chest. It entered the mediastinum in front 

 of the heart curving backward over that organ. The liver was 

 transposed. The hernia was through the right side. Besides the 

 true and the false varieties, there is the analogous condition of 

 eventration of the diaphragm. This is defined, 1 as a dislocation 

 cephalad of the abdominal viscera, particularly of the stomach, 

 on the left side under an abdominally high position of the left 

 vault of the diaphragm. The hernia herewith reported is believed 

 to be a congenital true diaphragmatic one, unique, in that part of 

 the liver as well as the gall bladder and the omentum were found 

 within the pericardial cavity. 



Respecting the mechanism of such a hernia, 2 Cunningham says: 

 "The diaphragm is occasionally deficient in the human subject 

 producing hernia either through the central tendon into the 

 pericardial cavity or through the lateral portions of the muscle 

 into the thoracic cavity." 3 Keibel and Mall, describing the de- 

 velopments of the body cavities holds, " In the rabbit the pericard- 

 ial coelom ends in two dorsal and two ventral recesses, all four of 

 which connect subsequently with the peritoneal coelom. How- 

 ever, only the dorsal recesses break into the peritoneal coelom in 

 the human embryo, and it is this recess or canal which later on 

 encircles the lung and probably forms the main anlage of the 

 pleural coelom." 



2. Bilateral Nephrolithiasis and Right Ureteral Calculus. 



A Dalmatian hound (187 B 2), female, and medium sized had 

 had both ureters transplanted into the sigmoid. The animal lived 

 nine days. At autopsy on the right side a dilated kidney pelvis 

 and a dilated ureter were found. The pelvis contained many 

 small rounded calculi and the ureter a larger elongated stone 

 cephalad to the uretero-colonic anastomosis. On the left side, 

 also, was found a hydronephrosis with a pelvic cast. The ureter 

 on the left side was dilated cephalad only. 



This selective ureteral dilatation has been noted several times 

 in a series of uretero-sigmoidal transplantations. An attempt 



1 Sailer and Rhein, Am. Jr. Med. Sci., Vol. CXXIX, p. 688. 



2 I). J. Cunningham, "Text-Book Anat.," Ed. 2, p. 426. 



• Keible and Mall, "Human Embryology," Vol. I, p. 526. 



