A system of surgery : pathological, diagnostic, therapeutic, and operative . Osteophytes of the inferior extremityof tlie femur. SECT. XIII. TUMORS. The bones, like the soft structures, are liable to two classes of tumors, theinnocent and the malignant. The former includes exostosis, fibro-cartilaginousgrowths, aneurism, hematoid formations, serous cysts, hydatids, and myeloidtumors; the latter, eneephaloid, colloid, scirrhus, and melanosis. INNOCENT rOBMATIONS. 1. EXOSTOSES OR BONY TUMORS. An exostosis, of which fig. 323 affords a good idea, is an osseous outgrowth,the word, which is a Greek
A system of surgery : pathological, diagnostic, therapeutic, and operative . Osteophytes of the inferior extremityof tlie femur. SECT. XIII. TUMORS. The bones, like the soft structures, are liable to two classes of tumors, theinnocent and the malignant. The former includes exostosis, fibro-cartilaginousgrowths, aneurism, hematoid formations, serous cysts, hydatids, and myeloidtumors; the latter, eneephaloid, colloid, scirrhus, and melanosis. INNOCENT rOBMATIONS. 1. EXOSTOSES OR BONY TUMORS. An exostosis, of which fig. 323 affords a good idea, is an osseous outgrowth,the word, which is a Greek compound, signifying a bone growing from a bone. Fig. Exostosis of the thigh-bone. It is in fact a local hypertrophy, a circumscribed tumor, possessing essentiallythe same structure as the bone from which it springs, and with whose substanceit is usually intimately identified. There is perhaps no term in surgical nomen-clature which has been more abused than this, or which has been applied to somany different and almost diametrically opposite diseases. Among those whohave especially contributed to bring about this confusion may be cited the name 832 DISEASES AND INJURIES OF BONES. CHAP. VIII. of Sir Astley Cooper, who, under the appellation of exostosis, has describedalmost every variety of tumor, whether benign or malignant, whether fleshy,fibrous, cartilaginous, or osseous, connected with or growing from a bone. Thisclassification, which was for a long time blindly followed by most writers, hasrecently given way to a more correct appreciation of the subject, and I know nopathologist whose opinion is worth much who does not consider an
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