THE HUMAN PROSTATE GLAND 



337 



tioned. Two of the specimens examined had enlarged anterior 

 lobes. Forty autopsy specimens of prostate gland enlargement 

 were examined in the pathological museum at Guy's Hospital, 

 London, thirty-seven of them showed the existence of glandular 

 substance in the middle lobe region, while in three cases there was 

 no macroscopic evidence of such a structure. 



TABLE 1 

 Showing the frequency of the occurrence of middle lobes 



Reference to table 1 shows that there is a definite absence of 

 glandular tissue in the middle lobe region in one specimen out of 

 one hundred and three studied, and five specimens in which it 

 was not determined whether there was glandular tissue there or 

 not. 



The lateral lobes are composed of tubules which are greater in 

 size and number than those of any of the other lobes. They 

 originate from the right and left prostatic furrows and the lower 

 parts of the lateral walls and extend backward and outward form- 

 ing the main part of the base of the prostate. In the younger 

 specimens these lobes are widely separated from each other and the 

 remaining lobes but the older the fetus studied the less is the sepa- 

 ration between the branches of the lateral and middle lobes, 

 although there is in all cases a definite separation observed where 

 the ducts communicate with the urethra. In the region of the 

 apex some of the lateral lobe tubules send branches forward, at 

 all other parts of the gland the direction of the growth of tubules 

 is back towards the bladder. 



