MYXOMA. 



291 



uterus, and kidneys. They are liable to undergo mucoid and 

 fatty degeneration. 



FIG. 118. 



Section of a nodular fibroma (Birch-Hirschfeld). The dense fibrous tissue is in 

 irregular nodules, between which are bands of less dense fibrous tissue con- 

 taining bloodvessels. 



'- ? 



A lipoma is a tumor composed of fatty tissue, similar to 

 normal adipose tissue, except that the fat-cells are larger, 

 contain more oil, and are not so regularly arranged. They 

 are tabulated, often grow to enormous size, and sometimes are 

 multiple (Fig. 119). They are most common in the sub- 

 cutaneous fatty tissue of the back, shoulders, and buttocks. 

 They are liable to myxomatotis and cystic degeneration and 

 calcification. 



A myxoma is a tumor composed of mucous tissue similar 

 to that of AVharton's substance of the umbilical cord and the 

 vitreous humor of the eye, which consists of a gelatinous, 

 homogeneous, or slightly granular matrix crossed by fine 

 fibrilla?, in which are imbedded irregular branching and 



