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Updated: May 14, 2025
The abscess is nearly always situated in the central axis of the bone in the region of the ossifying junction, although cases are occasionally met with in which it lies nearer the middle of the shaft. The tibia is the bone most commonly affected, but the lower end of the femur, or either end of the humerus, may be the seat of the abscess.
Ossification in the deltoid and pectoral muscles has been observed in foot-soldiers in the German army, and has received the name of "drill-bone"; it is due to bruising of the muscle by the recoil of the rifle. Progressive Ossifying Myositis. This is a rare and interesting disease, in which the muscles, tendons, and fasciæ throughout the body become the seat of ossification.
The occurrence of ankylosis in a joint before the skeleton has attained maturity does not appear to impair the growth in length of the bones affected; ankylosis of the temporo-maxillary joints, however, greatly impairs the growth of the mandible. When there is arrest of growth accompanying ankylosis, it usually depends on changes in the ossifying junctions caused by the original disease.
And it will be instructive to turn over the ancient volume, and to see how year by year the verses copied grew fewer, and finally ceased entirely. I do not say that all growth is progress: sometimes it is like that of the muscle, which once advanced into manly vigor and usefulness, but is now ossifying into rigidity.
Where the process is most advanced that is, at the ossifying junction there are evidences of absorption of the framework of the bone; the marrow spaces and Haversian canals undergo enlargement and become filled with greenish-yellow pus. This rarefaction of the spongy bone is the earliest change seen with the X-rays.
The Church has a few dissensions to combat; she has not been weakened by schism; but she is slowly ossifying from sheer inertia. The Reformation needs to be reformed again, and perhaps the tardy privileges granted to the Haugianer and Läsare the northern Methodists may result in producing a body of Dissenters large enough to excite emulation, action, and improvement.
An incision is made down to and through the periosteum, and whether pus is found or not, the bone should be opened in the vicinity of the ossifying junction by means of a drill, gouge, or trephine. If pus is found, the opening in the bone is extended along the shaft as far as the periosteum has been separated, and the infected marrow is removed with the spoon.
A rarer variety is the ossifying chondro-sarcoma, which undergoes ossification to such an extent as to be visible in skiagrams. In primary sarcoma the treatment consists in removing the muscle. In the limbs, the function of the muscle that is removed may be retained by transplanting an adjacent muscle in its place. Hydatid cysts of muscle resemble those developing in other tissues.
The process may remain localised to the ossifying junction, but usually spreads along the medullary canal for a varying distance, and also extends to the periosteum by way of the enlarged Haversian canals. The pus accumulates under the periosteum and lifts it up from the bone. The extent of spread in the medullary canal and beneath the periosteum is in close correspondence.
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