250 VETERINARY SURGICAL THERAPEUTICS. 
thing to do is to puncture it on the most dependent part. Antiseptic 
care easily brings recovery. If there is undermining of the skin, puncture 
is not enough, because the wound would close too rapidly ; a drainage-tube 
is necessary to permit the escape of pus and the injections of antiseptic 
washes. Seton is less recommendable. 
ffygroma of the Withers. (See Diseases of the Withers, vol. 2.) 
Atygroma of the Poll, (See Diseases of the Poll, vol. 2.) 
Tif. 
NEOPLASMS. 
Tumors of serous burs are exceptionally rare. The walls of these 
cavities may, however, be the starting-point for neoplasms of various 
kinds: sarcomas, fibromas, myxomas, fibrochondromas and epitheliomas. 
Fibromas and sarcomas are most ordinarily observed. 
The characters vary with the nature of the lesions. The clinical diag- 
nosis is somewhat difficult, since the marked induration of many chronic 
hygromas may resemble a true neoplasm. 
With malignant tumors, early and complete extirpation is here, as in 
similar cases, the only efficacious treatment. Such is it also for benignant 
growths which produce functional disturbances. Cauterization .is to be 
used only in cases of induration of an inflammatory nature produced by 
chronic hygromas. 
