488 DAVID M. DAVIS 



(b) Turrfors of the Rete (Wolffian epithelium). Some authors state 

 that these tumors do not exist, but those described by Sakaguchi may well 

 be placed under this head. They resemble closely the above described 

 tumors, except that they contain irregular gland-like spaces lined with 

 columnar epithelium exactly like that of the rete and tubuli recti. Clini- 

 cally, they are like seminomata. 



(c) Tumors of the Interstitial Cells. Several different tumors have 

 been described as arising from the interstitial cells. The type given by 

 Chevassu, however, is generally accepted. Kaufmann has added other 

 examples. This tumor is ovoid, firm, homogeneous, and of a brown color. 

 The cells are polygonal, often a little separated from one another, and 

 resemble interstitial cells exactly except for the absence of Reinke's crys- 

 talloids and the presence of glycogen. They occur in strands rather than 

 alveoli. The tumors show little or no malignancy, and are thought by 

 some not to be true tumors, but merely hyperplasias. Diirck and Pick (a.) 

 described cases of undoubted interstitial cell hyperplasia. Unfortunately 

 the literature is lacking in any reference to the presence or absence of 

 symptoms of hypergenitalism in these cases. 



Common Histoid Tumors. (a) Fibroma. Fibromata are rare in the 

 pure state. Histologically, they are like fibromata elsewhere. 



(b) Sarcoma. Sarcoma not arising from teratoma is very rare. The 

 ordinary spindle cell variety is occasionally seen. 



Organoid Tumors. Adenoma. Adenomata are rare. They consist 

 of small nodules, made up of masses of small, highly convoluted tubules 

 filled with epithelial cells, and in some places masses of interstitial cells. 

 They are benign. Tumors arising from the vessels and nerves have not 

 been observed. 



Heterotopic Tumors 



Intratesticular Embryoma. Teratoma. Teratomata are the most per- 

 fect embryomas. They contain many identifiable tissues, and some assert 

 that they must show derivatives of all three blastodermic layers. 



(a) Encysted Teratoma (Dermoid Cyst). In this form the embry- 

 onic tissues are arranged in a cyst, and the two poles of the embryo can 

 sometimes be made out. They are very rare in the male. 



(b) Solid Teratoma. These tumors are a mass of indescribably 

 mixed up tissues of all varieties, leaving no doubt as to the diagnosis. 



Mixed Tumor of the Testicle. This form is even simpler, consisting 

 of many cystic cavities, usually more or less alike, and other tissues, but 

 no sebaceous glands or hair. This rubric includes tumors formerly de- 

 scribed as cystoma, cystadenoma, enchoiidroma, myoma, myxoma, osteoma, 

 etc. They are almost equal to seminomata in frequency. 



Degenerated Embryoma. The above mentioned tumors frequently, 



