Chondroma. 



351 



(chondroma cysticum, myxomatodes, petrificans) are especially 

 likely to be observed; and sometimes ossification (chondroma 

 ossificans) takes place. 



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r 



X 



^ 



l-Hf 



A 



V 



Fig. 93. 

 Chondroflbroma of ovary of sheep (the uterus to the left). 



Chondromata are nodular, nodose, lobulated. rounded tumors 

 of dense (in case of myxomatous change or when other tissues 

 are combined they are softer) consistence; showing their car- 

 tilaginous substance as a milk-white, grayish and bluish w^hite, 

 semitransparent material. They may attain considerable dimen- 

 sions, perhaps the size of a human head, and may weigh from 

 ten to twenty-eight kilograms. According to their location the 

 cartilaginous tumors may arise from previously existing cartilage 

 (ecchondromata) . or may develop within the bone marrow or in 

 the soft tissues which do not contain cartilage (enchondromafa). 

 The former originate from the perichondrium, the cells of which 

 are usually concerned in formation of cartilage ; the latter arise 

 probablv from misplaced embryonic cartilaginous rudiments. 



