TUMORS 149 



more important examples being fibromata of the uterus, 

 ovaries, and mammary gland. Less frequently they 

 spring from the submucous connective tissue of the nose 

 and the subcutaneous connective tissue of the skin. 



Myxoma. Myxomata are benign tumors composed 

 largely of a form of mucous tissue having a connective- 

 tissue framework and an intercellular substance of a 

 gelatinous nature. Myxomata occur in submucous and 

 subcutaneous connective tissue and in the mammary 

 gland, brain, spinal cord, and nerves. 



Lipoma. Lipomata are benign tumors composed of 

 adipose tissue. The growths occur in the subcutaneous 

 tissue of the back, buttocks, thighs, and abdomen, 

 less frequently in the kidneys, mammary gland, and 

 brain. 



Chondroma. Chondromata are benign tumors com- 

 posed almost exclusively of cartilage. A small amount 

 of connective tissue acts as a framework for the blood- 

 vessels of the growth. Chondromata usually occur in 

 bone periosteum or cartilage, but are occasionally 

 found in the testicle, ovary, and parotid gland, where 

 their presence must be accounted for on the theory of 

 a misplaced matrix of cartilaginous tissue. 



Osteoma. Osteomata are benign tumors composed of 

 bone. They are found usually in connection with bony 

 or cartilaginous tissue, though, like chondromata, they 

 also occur in the testicle, ovary, and parotid gland. 

 The most common example of osteoma is the exostosis 



