298 MANUAL OF EQUINE MEDICINE. 



of recent inflammation of the neighbouring parts may be 

 observed after death. 



2. CANCER. — Cancerous growths are said to have been 

 met with in rare instances in connection with the meninges 

 and substance of the brain. When occurring here, these 

 growths are nearly always due to secondary infection from 

 primary cancerous disease of other organs of the body. 



3. MELANOSIS. — Melanotic growths are sometimes 

 observed in connection with the meninges and brain sub- 

 stance of the horse. Mr. Williams mentions a case in which 

 black melanotic nodules were observed in the brain and 

 membranes of an aged grey stallion which had suffered for 

 some time from stringhalt. These nodules were also found 

 along the spinal cord, and w^ere especially numerous in the 

 lumbar region. 



4. GLIOMA. — Glioma isa variety of round-celled sarcoma, 

 growing from the neuroglia of nerve-tissue. It consists of 

 small round cells, and has been met with by Mr. Eobertson 

 on several occasions in connection with the cerebellum as an 

 ill-defined tumour. 



We have met with some patches of firm dense greyish 

 tissue in connection with the cerebellum, but on examina- 

 tion they proved to be merely patches of sclerosis, no cells 

 of a sarcomatous nature being found. 



5. FIBROMA. — Fibromata have been sometimes observed 

 in connection with the meninges of the brain. 



6. PARASITIC GROWTHS are sometimes met with in 

 connection with cerebral structures (vide Chapter on 

 *Entozoa).' 



