238 CLINICAL VETERINARY MEDICINE AND SURGERY. 



yellowish nodules, of rather firm, uniform consistence, the majority 

 varying in size between a hemp-seed and large pea. Many of those in 

 the superficial layers of the organ are hemispherical or conical — their 

 base resting on Glisson's capsule — with finely dentated circumference 

 (Fig. 18). The largest have a whitish periphery and slightly depressed 

 yellowish centre ; a few of smaller size sometimes present a glistening 



Fig. 18. — Tuberculosis of the liver. 



nacreous appearance, and a central opaque, caseous point. In this 

 form the lesions are somewhat similar to those seen in hepatic tuber- 

 culosis of fowls, and have often been mistaken for cancer. Straus 

 himself, on examining the liver I sent him, at first thought I must have 

 been mistaken, so similar were the lesions to cancerous nodules. In 

 some subjects, instead of presenting this appearance, the liver is 

 deformed by large yellowish-white tuberculous areas of uniform sar- 

 comatous consistence, or softened and excavated at their centre by a 

 more or less spacious cavity filled with greyish or lactescent fluid. In 

 this liver, which was removed from a dog killed a few months ago, you 

 see this atypical form of tuberculosis ; the lesions appear as large 

 yellowish-white cystic tumours, fluctuating throughout the greater 

 portion of their area, covered with branching vessels, but firmer 

 towards their margins, which are sharply defined (Fig. 19). 



The mesentery and epiploon, which are sometimes thickened and 

 indurated, are generally dotted over with granules and isolated or con- 

 fluent tubercles. They may also be the seat of hyperplastic changes 

 producing atypical lesions described as sarcomatous. The epiploon 



