1028 Renal Tumors. 



tomy) can, in case of unilateral disease, be considered, if the 

 enlarged kidney interferes with the health of the animal by 

 compressing the abdominal organs. This procedure can, only 

 then be successful when the other organ is still capable of 

 functioning. 



Literature. Barrier, Bull., 1906. 683. — Basset, Eev. g§ii., 1903. I. 263. — 



Horn, Beitr. z. Kenntn. d. chron. Nierenerkrank. d. Schafes. Diss. Leipzig, 1908. 



— Kowalewski, A. f. Vet.-Wiss., 1904. 1004. — Kiikuljevie, A. L., 1905. 539. — 



. Lucks, Monh., 1905. XVI. 254. — Eiehter, Z. f. Plhyg., 1907. XVII. 429. — Suffran 



& Daille, Eev. v&t., 1905. 612. 



14. Renal Tumors. 



Among new-formations in the kidneys there are found especially 

 adenomas and carcinomas; primary sarcoma is very rare, but second- 

 arily it occurs occasionally. In dogs villous proliferations sometimes 

 develop in the renal pelvis and in the ureter, and impede the outflow of 

 the urine, thus causing dilatation of the renal pelvis and atrophy of the 

 substance of the kidney. 



Tuberculosis of the kidneys is frequent in cattle and is also met with 

 in dogs and pigs. Small tubercles or larger cheesy foci are disseminated 

 mainly in the cortical portion where they originated through embolisms. 

 As the cheesy foci enlarge they may finally perforate the walls of the 

 renal pelvis and then the tuberculous process passes over into the 

 mucous membrane of the latter. Tuberculosis may in this location some- 

 times also arise from urogenic infection. 



New-formations in the kidneys are recognized only with difficulty 

 and their recognition is only possible if one or both kidneys are; con- 

 siderably enlarged. The actual nature of the new- formation is some- 

 times indicated by external conditions, such as their presence in other 

 organs or as the enlargement of inguinal glands (in carcinonaa). If an 

 enlargement of the kidneys exists or if the urine-carrying organs are 

 not affected the diagnosis of renal tuberculosis depends upon the demon- 

 stration of tubercle bacilli in the urine. 



The treatment can at best be symptomatic. 



15. Animal Parasites in the Kidneys, 

 (a) Eustrongylus gigas. 



Etiology. The eustrongylus gigas, which sometimes occurs 

 as a parasite in the renal pelvis of dogs, horses, cattle; also 

 in many wild living animals and in man, is a blood-red thread- 

 worm about the size of a lead pencil; the male is 13-40 cm. 

 long, the female 20 cm.-l m. The eggs (Fig. 177) are oval in 

 shape, brownish in color; their covering is thick and shows 

 numerous round depressions. The eggs are 68-80 /* long and 

 30-44 '' wide. 



It is not known how the worm enters the renal pelvis. 

 While it grows here it produces a severe purulent and hemor- 

 rhagic inflammation which in its turn causes a secondary in- 



