344 



Tumors. 



each other and meshes are formed and become more or less dis- 

 tended, and the cells take on branched, stellate shapes. Such 

 a growth is also known as fibroma myxoiiiatodes or Hbromyxoma 

 from the gelatinous change present in it ; the more vascular 

 reddish ones as raspberry polyps, fibroma angiomatodcs, caver- 

 iiosum or tclcangiectaticum. 



Occasionally calcification or even ossification takes place in 



Fig. 88. 

 Section of a flbroma from a liorse. 



the tissue of fibromata, producing dull white foci of bony hard- 

 ness (fibroma pctrificans, ossificans). 



Sometimes the fibrous tissue formation is found about the 

 bloodvessels or about the glandular ducts or nerves, arranged in 

 circular concentric whorls and systems of bundles about these 

 structures ; such growths being described under the terms plcxi- 

 form or pericanalicular fibromata. 



Fibromata growing from scars or imperfectly cicatrized granulation 

 tissue from wounds are apt to become especially dense, consisting of thick, 

 closel}' packed, interwoven bundles of fine fibrils, are known in human 



