The pathology and surgical treatment of tumors . of the bone is well shown in decalcified stained sections. Ifthe tumor starts in the bone, it is surrounded by a zone of connectivetissue which separates it from the surrounding tissues. In the ivory-like tumors upon the surface of the cranial bones and the shaft of thelong bones the lamellae are so compact that the medullary spaces andthe blood-vessels cannot be identified. The section of such a tumorresembles ivory in compactness. In periosteal osteoma the tumor isat first not connected with the underlying bone, and at this stage canreadily be
The pathology and surgical treatment of tumors . of the bone is well shown in decalcified stained sections. Ifthe tumor starts in the bone, it is surrounded by a zone of connectivetissue which separates it from the surrounding tissues. In the ivory-like tumors upon the surface of the cranial bones and the shaft of thelong bones the lamellae are so compact that the medullary spaces andthe blood-vessels cannot be identified. The section of such a tumorresembles ivory in compactness. In periosteal osteoma the tumor isat first not connected with the underlying bone, and at this stage canreadily be detached. Later the surface of the tumor becomes attachedto the bone and receives from it a part of its vascular supply. Afterthe union has become complete a section through the tumor does notshow the line where the union was effected. In the development of an chondroma into an osteoma thedifferent phases of transition of cartikigc into bone-tissue can beobserved. Osteoma is almost immune to the different regressive meta- OSTEOMA. 429. Fig. 300.—Spongy oslcoma <if Lianiuni ; -, 250 (after Perls) : a, old bone-tissue with thick cancelli parallelwith the surface ; b, young spongy bone-tissue with irregularly-arranged cancelli.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectneoplas, bookyear1895
