592 



CLINICAL VETERINARY MEDICINE AND SURGERY 



various lesions, which were unsuccessfully used for inoculating other 

 fowls, rabbits, and guinea-pigs, were all of similar structure, being 

 formed of small, closely packed, polyhedric cells provided with large 

 nuclei. A considerable number of vessels were seen, but no stroma 

 could be discovered. These peculiar tumours differed considerably 

 from any seen in mammals. 



To facilitate study of the results of our research we recapitulate 

 them in the form of a table. 



Species 



of 

 Animal. 



Dog, 38 

 cases. 



Horse, 5 

 cases. 



Seat of the Tumours. 



Mammary gland 



Testicle . . . . 

 Facial sinuses and superior 

 maxilla . . . . 



Parotid gland 

 Peri-anal glands 

 Thyroid gland . 



Skin . . . . . 



Lips . 



Penis . 

 Lungs 



Thoracic wall 

 Buttock . 



Elbow region 



Spinal column 

 Mammary gland 

 Testicle 



Facial sinuses 



Nature of the Tumours. Number. 



Cat 

 F"owl 



■{ 



Stomach . 



Thoracic wall 

 Feet . 

 Viscera 



nd luno's 



rAdenoid epithelioma . 

 J Fusiform-celled sarcoma 

 I Chondroid sarcoma 

 |_ Osteoid sarcoma 



Adenoid epithelioma 

 r Alveolar epithelioma 

 \ Lymphadenoma . 



Epithelioma with epidermal " nests" 



Adenoid epithelioma .... 



Epithelioma with small polyhedral cells 



Pavement epithelioma with epidermal 

 " nests " . 

 1 Small-celled epithelioma 

 L Epithelioma of the sebaceous gland 

 f Epithelioma with tendency to scirrhous 

 \ transformation 



Adenoid epithelioma . 



Epithelioma 



Epithelioma 



P'usiform-celled sarcoma 

 f Round-celled sarcoma 

 \ Epithelioma 



Fusiform-celled sarcoma 



Adenoid epithelioma . 



Adenoid epithelioma . 

 r Epithelioma 

 1 Globo-cellular sarcoma 

 r Pavement epithelioma with epiderma 

 \ " nests " . 



Cylindrical epithelioma 



Masses of polyhedral cells 



Masses of polyhedral cells 



18 



When cancer occurs in parts accessible to manual examination, it 

 first appears as a swelling, which gradually increases in size and soon 

 becomes adherent to the skin. In almost all cases the primary lesion 

 is surrounded by hard, irregular, lymphatic chains running towards 

 the neighbouring lymphatic glands, which are enlarged. Secondary 

 tumours next appear, either around the new growth or over the track 

 of the indurated lymphatics. At the same time the tumour increases 

 in size, becomes bosselated and sometimes ulcerated at certain points. 



The mode of development of cancer varies extremely. Speaking 



