The principles of surgery . teo-sarcoma entails but little disorder of the general health. Osteocepha-loma is attended with marked cachexy, even from the beginning. 7.A casual abrasion of the skin, or mucous membrane, investing anosteosarcoma, shows a simple character; and may be brought to heal,under ordinary treatment. A similar breach, in the surface of an osteo-cephaloma, does not heal, but widens more and more, and becomes thesite of fungous protrusion. 8. Osteosarcoma does not invade the neigh-boring tissues; but pushes them aside by its expansion, and abideswithin the bone in which it w

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The principles of surgery . teo-sarcoma entails but little disorder of the general health. Osteocepha-loma is attended with marked cachexy, even from the beginning. 7.A casual abrasion of the skin, or mucous membrane, investing anosteosarcoma, shows a simple character; and may be brought to heal, under ordinary treatment. A similar breach, in the surface of an osteo-cephaloma, does not heal, but widens more and more, and becomes thesite of fungous protrusion. 8. Osteosarcoma does not invade the neigh-boring tissues; but pushes them aside by its expansion, and abideswithin the bone in which it was first developed. In the upper jaw, for 426 DIAGNOSIS OF TUMORS OF BONE. example, it remains limited to the expanded confines of the antrum.And, at those parts where the bony and even membranous parietes arcdeficient, there is no ulceration followed by fungous protrusion; butonly a moderate increase of growth, in a tabulated form, with or withouta rawness of the surface. Osteocephaloma, on the other hand, pushes Fis. 152.. Lar^e Osteosarcoma of upper jaw: macerated, showing: the osseous stroma. Still limited to the superiormaxilla, in which it originated.—Howsmr. no texture much aside, but early involves all; the antrum is soon passedbeyond ; and the base of the cranium is affected, even before much ap-pearance has been made externally. Wherever deficiency of the invest-ing texture occurs, ulceration and fungous growth are sure to follow.9. Osteosarcoma long continues in the occult condition. Breach of thesurface, when it does occur, does not extend rapidly, and evinces nomalignancy of character. The discharge is purulent, or puriform ; notprofuse. There is no tendency to hemorrhage, unless by accidental in-jury ; and then it is slight, and easily restrained by pressure. Osteoce-phaloma soon passes from the occult to the open state. The ulcerspreads, and is obviously the seat of malignancy. Discharge is profuse, fetid, and bloody. Hemorrhage is not unlikely ; of spontaneous