384 Surgical Diseases and Surgery of the Dog 



from the size of a pea to that of an apple or even the infantile head. 



Carcinoma of the Skin manifests a predilection for the Ears and 

 Eyelids or their proximity, the Edges of the Lips, the Root of the 

 Tail, the Legs, the Paws, and the Scrotum. Carcinoma of the 

 Testes is not uncommon though there has been some difference of 

 opinion among veterinary pathologists as to the identity of these tu- 

 mors. Malignant growths of the testes are peculiarly difficult to 

 classify, as there may be every kind of deviation from the pure con- 

 nective tissue tumor through the mixed connective, adenomatous, or 

 cystic tumor, to the tumor of the almost purely glandular cancerous 

 type. The liability for tumors to show both proliferation of the tubes 

 and proliferation of the interstitial tissue, a peculiarity which is 

 also seen to some degree in the kidney is the explanation of the so- 

 called carcinoma-sarcomatodes. Kitt refers to the condition when 

 confined to the testicle as Hypertrophia adenosarcomatosa testis but 

 when it assumes a progressive character he names it Carcinoma testis 

 sarcomatodes. In cryptorchids the retained organ is often cancer- 

 ous. (Leisering, Sutton) 



Primary Carcinoma of the Viscera is a comparatively rare dis- 

 ease. The organs in which either primary or secondary forms occur 

 are: the Bladder (Schulz, Demeurisse), the Prostate Gland, the 

 Kidneys and Supra-renals (Bruckmueller, M'Fadyean, Kitt, Bour- 

 ney), the Ureters (Siedamgrotzky), the Uterus (Leblanc, Bruck- 

 mueller, Camardi), the Thyroid (Siedamgrotzky), the Intestinal 

 Canal (Mueller, Cadeac, Laborde, Huidekoper, Eberlein), the Pan- 

 creas (Nocard, Cadeac), the Liver (Siedamgrotzky), the Spleen, 

 the Peritoneum (Cadeac), the Lungs (Kitt, Cadeac, Lienaux), 

 and the Heart (Cadibt). 



(2) COMPOUND TXJMORS. 



Teratomata Comprising (a) Dermoid Tumors and Cysts and 

 (b) Parasitic Fetuses. 



Dermoid Tumors and Cysts. These arise from sequestered por- 

 tions of the epiblast, occurring usually in unnatural positions. A 

 famiUar example of Sequestration Dermoid is seen in the small " 

 cutaneous nodules furnished with vibrissae which are constantly 

 present on the Cheeks in a line with the angle of the mouth. The 

 mucosa lining the surface of the Eye-ball is occasionally the seat of 

 congenital patches of skin, bearing tufts of hair, which have re- 



