MORBID ANATOMY 263 



Turkey No. /^.— About 3 months old. Taken from a flock August 

 8 because of lack of strength to keep up with the rest when driven. 

 Indications of diarrhoea. Placed in a coop, where it died during the 

 night. Examined next morning. 



Slight odor of decomposition. A few small warts on skin of neck. 

 The various organs were found normal, with the following exceptions : 

 Mucosa of duodenum almost blackish, from intense injection and 

 pigmentation of villi. 



Both caeca diseased. The left is slightly distended. On serous 

 aspect two yellowish spots, with markedly injected borders, correspond- 

 ing to thickenings of the walls near the blind end of tube. The mucous 

 surface of one is smooth ; to the other an exudate is attached. Besides 

 the thickening at these spots, the free half of this caecum is somewhat 

 thickened uniformly. 



The right caecum is very much distended over two-thirds of its 

 length. From the serous surface local thickenings are recognizable, 

 which have a yellowish, mottled appearance. The small intestine is 

 firmly attached to one of these. The disease has, however, not invaded 

 the wall of the latter. The border of these spots is intensely hyperaemic. 

 AVhen the caecum is slit open its width is three to four times that of the 

 undistended tube, and the thickness of the wall varies from one-eighth 

 to one-half of an inch, being not less than one-eighth of an inch over 

 three-fourths of the entire length. When the brownish feces were 

 washed away the increased local thickenings were found covered with 

 firm exudates, usually attached in but one spot. 



Sections were examined of that portion of the caecal walls which 

 was very nmch thickened, and to which the contiguous small intestine 

 was inseparately attached by the new growth. 



The mucosa of the caecal portion had sloughed away, while that of 

 the embedded small intestine was intact. The neoplastic tissue between 

 caecum and intestine was fully i cm. (two-fifths inch) thick. Inasmuch 

 as the infiltration probably followed the narrow mesentery between 

 caecum and intestine the original boundary lines of the caecal wall are 

 no longer recognizable. The muscular coat of the caecum may be traced 

 for only a short distance into the neoplasm, when it disappears. Micro- 

 parasites were not seen distinctly in the diseased tissue. 



The liver is very much enlarged, and dotted everywhere with 

 roundish spots of varying appearance. The majority are from 5 to 

 12 mm. in diameter, round or slightly oval. The center of each is 

 usually occupied by a group of yellowish dots and the circle is bounded 

 bv a narrow yellowish ring. The space of the circle is mottled brownish. 

 Among these spots there are also circles of a completely yellowish color. 

 On the convex surface of the left lobe there is a very firm, ring-like, 

 yellowish mass, cutting like firm cheese. 



In crushed preparations of fresh liver tissue from within the brown- 

 ish circles many giant cells are seen. They consist of a meshwork of 



