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Updated: June 9, 2025
Wiltshire reports such a case in a woman who had a most prominent sacrum; the laceration was transverse and quite extensive, but the woman made a good recovery. Schauta pictures an exostosis on the promontory of the sacrum.
This type of ringbone as well as the articular may occur "high" or "low." With the traumatic form of ringbone, all consequences, as to the size and form the exostosis is to assume, depend upon the nature and extent of the injury. Rachitic ringbone is frequently observed in some sections of the country and does not ordinarily cause much if any lameness.
While an exostosis involving any one of the splint bones, even when directly caused by an injury, is called a "splint," the term is employed here, in reference to exostoses not due to direct injury such as in contusions. Etiology and Occurrence. There is incited an inflammation of the periosteum at the site of the interosseous ligament which attaches the small to the large metacarpal bone.
Varying pathological developments often result from concussion, contusion or other violent shocks to the bony structures. In such cases there either follows a simple periostitis which may resolve spontaneously with no obvious outward symptom, or osteitis, which may occur with tissue changes, as in exostosis; or the case may produce any degree of reaction between these two possible extremes.
The hair over the entire surgical field is clipped and the cautery at white heat is pushed through the overlying soft tissues and into the central part of the exostosis. Care is taken to keep the cautery-point away from the articular margin of the tibial tarsal bone about three-fourths of an inch. No danger will result from cauterizing to a depth of three-fourths of an inch in the average case.
There is no reason to suppose that an exostosis formed on the frontal bone as a result of repeated mechanical stimulation due to the butting of stags would give off a special hormone which was never formed in the body before, but it would probably in its increased growth give off an increased quantity of intermediate waste products of the same kind as the tissues from which it arose gave off before.
From the fact that it projects from the surface of the bone it is often spoken of as an exostosis. It grows slowly, and rarely causes any discomfort unless it presses upon a nerve-trunk or upon a bursa which has developed over it. Operative interference is only indicated when the tumour is giving rise to inconvenience. It is then removed, its base or neck being divided by means of the chisel.
In such cases, by immobilizing the affected parts as in fracture, and confining the subject in a sling for about sixty days, partial recovery may occur in some instances. Experience has shown that where luxation with detachment of a collateral ligament occurs, recovery is slow and incomplete there always results considerable exostosis at the site of injury. Sesamoiditis. Etiology and Occurrence.
Also, the extent or area of the base of an exostosis as well as its exact position, needs be determined before one may estimate the probable outcome in any case, whether treatment should be encouraged or discouraged by the practitioner.
When situated anterior to the tarsus a large exostosis may by mechanical interference to function, cause lameness when all other causes are absent. In making examinations one must not be deceived by the inconspicuous and seemingly insignificant exostosis which has a broad base.
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