488 



TUMOES. 



they have been found in other organs. I am indebted to Dr. 

 Clinton Wagner for a specimen of an almost perfectly developed 

 auricle of an ear, attached to the soft palate. Cartilaginous 

 tumors grown in glandular organs not infrequently exhibit 

 partial mucoid degeneration and secondary formation of cysts 

 cysto-cliondroma. Sometimes there is a calcareous deposition in 



the tissue of chondroma and 

 a combination of cartilagin- 

 ous with bony tissue osteo- 

 cJiondroma; or, as mention- 

 ed before, a combination of 

 chondroma with myeloma 

 cJiondro - myeloma. This 

 was the condition of a tum- 

 or the size of a child's skull, 

 grown in the testis, and 

 from which Fig. 187 is 

 taken. 



Among the soft tissues, 

 chondroma is known to 

 occur primarily in the par- 

 otid and the submaxillary 

 gland, in the female breast, 

 in the periosteum of the 

 phalanges, in the testes, and 

 in the lungs. It causes only 

 local disturbances ; occa- 

 sionally, however, by sup- 

 puration and ulcerative destruction it may become rather serious. 

 In bones, chondroma originates either from the surface (perios- 

 teum) or from the cancellous portion, the diploe of skull-bones 

 and the central medullary space of shaft-bones. The most com- 

 mon places for chondroma to appear are the phalanges and meta- 

 carpal bones of the fingers, more rarely those of the toes j next, 

 the epiphyses of the shaft-bones, the carpal and tarsal bones, the 

 ribs, the sternum, and very rarely the pelvis and skull-bones, the 

 upper maxillary bone, and the socket of the eye. The simulta- 

 neous growth of a number of cartilaginous tumors in several of 

 the above enumerated localities has also been observed. What 

 pathologists describe as central chondroma, arising from the 

 medulla of the shaft-bones, in many instances probably was, 

 judging from the clinical phenomena and the multiplication in 

 the lungs, myxo- and chondro-myeloma, but not pure chondroma. 



FIG. 187. CHONDROMA OF TESTICLE. 



P, plastids, mostly nucleated and coarsely gran 

 ular ; _B, finely granular, so-called " hyaline 

 substance. Magnified 600 diameters. 



