TUMOURS OF THE SHEATH AND PENIS. 665 



tissues, often becoming so abundant as partially to obstruct the 

 meatus. There is, however, no cause for alarm. Excessive granulation 

 soon ceases, the parts heal ; like the wound on the extremity of 

 the penis, cicatricial contraction results in drawing the mucous 

 membrane towards the skin, and the urethral opening resumes and 

 permanently preserves the shape given to it by the operator. In 

 both cases the final result is the same ; when the surgeon has done 

 his part well, patency of the urethral opening is ensured. As soon 

 as inflammatory symptoms disappear, the animal stales with the 

 same ease as any other horse. 



Of five cases operated on in the Alfort clinique, during a period of 

 two years, not one showed after-contraction ; and in those treated 

 between 1890 and 1895 the results — -except for haemorrhage — were 

 not less satisfactory. 



A case of necrosis of the penis in the dog, successfully treated 

 by operation, is described in Cadiot and Dollar's " Clinical Veterinary 

 Medicine and Surgery," p. 409. For cases in the horse, see p. 411, 

 412, and 413 loc. cit. 



In dogs, amputation can be effected either behind the os penis 

 by using the knife or ecraseur, or the bone can be sawn through. 

 After the latter method strictures and closure of the urethra are 

 certainly commoner, though amputation behind the os penis by 

 ligaturing blood-vessels, and exposing and sewing the urethra to 

 the neighbouring parts, and amputation by sawing through the os 

 penis, have been equally successful. A dog operated on in the latter 

 manner died a year later from disease of the bladder. On post- 

 mortem, the stump was found cicatrised without any considerable 

 stricture of the urethra. After-treatment is in all methods the same, 

 and consists in washing or syringing out the sheath with disinfecting 

 fluids. 



IV.— TUMOURS OF THE SHEATH AND PENIS. 



Fibromata (warts) are often seen on the horse's sheath ; according 

 to Moller's experience, carcinomata also occur here, and melano- 

 sarcomata and melano-carcinomata have been reported. Piovesau 

 removed a fibro-sarcoma as large as a child's head from a stallion's 

 sheath. Warts occur on the prepuce of the dog and of other animals, 

 not infrequently in great numbers. They are generally situated 

 on the inner folds, but frequently on the penis also. Whether 

 condylomata occur here, as Bayer believes, seems questionable. 



The simultaneous appearance of warts on the mouth does not 

 prove the specific nature of the new growths, because warts are also 



