THE REPRODUCTIVE ORGANS OF THE FEMALE. 



707 



Fibroma. Circumscribed tumors composed of connective tissue are 

 sometimes found in the breast. They are dense and hard, and may en- 

 close some of the gland ducts and acini. 



IntracanalicuJar Fibroma. These tumors are formed by a diffuse 

 growth of connective tissue, and a growth of polypoid fibrous tumors 

 from the walls of the milk ducts into their cavities leading to dilatation. 



a 



s & 



m. 





FIG. 463. INTRACAXALICULAR FIBROMA OF THE MAMMA. 



The glandular acini may be atrophied, or enlarged, or cystic. A section 

 of such a tumor looks like a solid mass of fibrous tissue, divided by clefts 

 and fissures lined with cylindrical or cuboidal epithelium (Fig. 463), or 

 fibrous tissue containing cysts into which project polypoid fibrous out- 

 growths from the walls. Sometimes the new-formed fibrous growths into- 

 the dilated ducts are adenomatous in character, containing many new 

 formed irregular acini (Fig. 464). Such tumors may be called intra- 

 canalicular fibro-adenomata. These tumors grow slowly, but if left to 

 themselves may reach an enormous size. The skin over them may ulcer- 



