Bone and joint studies. 1 / by Leonard W. Ely, and John Francis Cowan.

  • Ely, Leonard W.
Date:
1916
Catalogue details

Licence: Public Domain Mark

Credit: Bone and joint studies. 1 / by Leonard W. Ely, and John Francis Cowan. Source: Wellcome Collection.

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    HistoLocy.—The cartilage varies in its thickness. Over one half it is very thin, over the other of about normal thickness. Its thin part resembles hyaline cartilage more than fibro-cartilage. “Fingers” of mar- row are pushing up into it. The trabeculae stain irregularly, and seem to be undergoing absorption, but not by osteoclasts. They cease almost entirely about I cm. from the joint. XVII, 175. Normal joint. Red marrow in both bones. In the clavicle are reddish, irregular, rather firm areas of what appears to be fibrous tissue, from which all bone has disappeared. In the sternum at about 1 cm. from the joint begins an area of yellowish, fairly tough fibrous tissue, which takes up the entire space between the layers of cortical bone. It also contains no bone. Histotocy.—Well-marked carcinoma. The nodules are composed of fibrous tissue and epithelial cells, and infiltrate the surrounding healthy marrow. XVII, 179. Normal joint. Red marrow in both bones. In this, as in the preceding specimen, the spongy bone of the clavicle at a distance of about I cm. from the joint disappears, and is replaced by a soft pulpy mass of what appears to be yellow marrow, filling the entire area be- tween the layers of cortical bone. HistoLocy.—Pulpy area identified. It consists of densely packed marrow cells, of “myxomatous” marrow, and of a few small trabeculae. XVIII, 4. The bone in the clavicle seems much denser than nor- mal. The marrow canal is filled with bone only slightly less dense than the thick cortical bone. There is little else but dense bone in the clavicle —Jjust a little dense, spongy bone in the immediate vicinity of the joint and in small patches elsewhere. The cortex is enormously thickened, and bulges out at one spot about 2 cm. distant from the joint. The sternum contains red marrow. The joint is normal. HistoLocy.—There is a great increase of bone throughout the clav- icle. The trabeculae are enormously thickened. Very little of a cortex with its regular arrangement exists. The cortex is formed by the thick trabeculae, among many of which the fibrous tissue passes down from the periosteum into the marrow. The marrow is mostly fibrous. The bulging of the cortex noted macroscopically consists of dense fibrous tis- sue replacing the cortex, and the bone and marrow beneath it. The marrow of the sternum is lymphoid. XVIII, 15. Red marrow throughout, except for a small trans- verse band of yellow in the clavicle about 1 cm. from the joint, and a small patch of yellow in the sternum a short distance from the joint