484 TUMORS. 



with the spindles. An oblique section of a bundle is obviously 

 marked by short spindles ; while the transverse section of the 

 bundle exhibits circular formations, which are surrounded by a 

 reticulum of bioplasson or of cement-substance. Where capil- 

 lary blood-vessels traverse the tissue, the spindles are seen di- 

 rectly connected with the endothelial wall by means of delicate 

 filaments. (See Fig. 185.) 



The varieties of fibroma are : 



(a) Loose fibrous connective tissue, composed of delicate bun- 

 dles of fibrillae (see page 159), builds up fibrous tumors of a 



FIG. 185. FIBROMA OF VAGINA. 



L, connective-tissue fibers composed of spindles, cut longitudinally ; O, oblique sections of 

 spindles ; T, transverse sections of spindles ; C, capillary blood-vessel. Magnified 100O 

 diameters. 



moderate degree of consistency, while the vascular supply is 

 not abundant. They occur usually as sessile tumors of the skin, 

 with a smooth or lobulated surface, and, if piginented, bear the 

 name of moles (naevus or melanoma). They are frequently found 

 on the mucous membranes, especially of the posterior nares, the 

 pharynx and larynx, and the uterus. Polypous, pediculated tumors- 

 of the uterus are often constructed of delicate fibrous connective 

 tissue, which in this situation is sometimes abundantly supplied 

 with blood-vessels. This variety blends with the next. 



(bj Myxo-fibroma or soft fibroma, which may be considered as 

 an intermediate stage between myxoma and fibroma. The myx- 



