The pathology and surgical treatment of tumors . hedisplacement of islets of adenoid tissue during the development of theembryo. We have to assign to heterotopic chondroma a similar originby assuming as its starting-point the presence of a matrix composedof embryonic cartilage-cells or chondroblasts. Chondroma is some-times produced by a simple outgrowth from pre-existing cartilage, that,as a rule, attains no great size. Virchow names these growths ccclion-droses, and cites as their best examples outgrowths from the cartilagesof the ribs, the cartilages of the amphiarthrodial joints, the carti
The pathology and surgical treatment of tumors . hedisplacement of islets of adenoid tissue during the development of theembryo. We have to assign to heterotopic chondroma a similar originby assuming as its starting-point the presence of a matrix composedof embryonic cartilage-cells or chondroblasts. Chondroma is some-times produced by a simple outgrowth from pre-existing cartilage, that,as a rule, attains no great size. Virchow names these growths ccclion-droses, and cites as their best examples outgrowths from the cartilagesof the ribs, the cartilages of the amphiarthrodial joints, the cartilagesof the trachea and the bronchial tubes, and from the cartilage betweenthe basi-sphenoid and occipital bones in the young cranium. In suchcases we must assume the existence of a superabundance of chondro-blasts which produce the localized hyperplasia, but which do notresult in the formation of large tumors, owing to the inhibitoryinfluence exerted upon the growth by the surrounding normalcartilage. 415 4i( PATHOLOGY AND TREATMENT OF Fig. 291.—Condyles and epiphyseal lineof a rickety femur, with a cartilage island(after Sutton). In the majority of cases cartilaginous tumors are found connectedwith the bones and the joints. Virchow in his classical article on Chondroma places great stress on the frequency with which such tumors spring from the epiphyseal car-tilage. He found frequently in thislocality, in adults, remnants of unossi-fied cartilage a centimeter and more indiameter. Such islands of cartilage-tissue are frequently seen in the epiphys-eal extremity of the long bones in rick-ety subjects (Fig. 291). It is well known that rickety personsare exceedingly prone to cartilaginoustumors. Virchow believes that a de-ficient blood-supply is often the causeof arrested ossification in such influences that excite proliferation insuch embryonal remnants of cartilage are rickets and an hereditary pre-disposition. In glands and in other parts of the body in wh
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectneoplas, bookyear1895
