486 



DAVID M. DAVIS 



lesion of the te'stis. Kecent investigations have led a number of authors to 

 suspect that mycotic infections are more common than ordinarily assumed. 



They are usually mis- 

 taken for tuberculosis. 



Glanders. Glan- 

 ders is said to affect first 

 the sac of the tunica 

 vaginalis, and secondar- 

 ily the testis. The lesion 

 is chronic, nodular, and 

 easeating. 



Leprosy. - - Leprosy 

 causes a productive in- 

 flammation, with round 

 and plasma cell infiltra- 

 tion, and early sterility. 

 The bacilli are present 

 in large clumps in the 

 tubules. Simmonds de- 

 scribes a hyperplasia of 

 the interstitial cells. 



Filariasis. A true 

 filarial orchitis may oc- 

 cur, giving rise to an en- 

 larged nodular testis. 

 The lesion is a perilym- 



Fiff.'O. Early tuberculosis of the testicle. The sec- phatic fibrosis. The tes- 

 tion illustrates the intratubular method of spread, the 

 tubercle developing within the still clearly visible tubu- 

 lar wall. X 150. ( Brady Urological Institute col- 

 lection.) 



ticle is, however, usually 

 not involved in scrota 1 

 elephantiasis, 



Malarial orchitis has 



been described, but probably does not occur. 



EcJiinococcus cysts mav very rarely involve the testis. 



Tumors 



Tumors of the testicle offer the greatest difficulties in interpretation. 

 The reader is referred to the detailed literature for extensive discussions 

 of this subject, The classification adopted here is one which gives a fairly 

 satisfactory arrangement of the histological criteria as we understand them 

 at present. Tumors are considered as arising from the tissues normally 

 present in the testis, and from elements foreign thereto. The nature of 

 these foreign elements, which give rise to teratomata and mixed tumors, 



