keratogenous

We may define it as a chronic inflammatory condition of the keratogenous membrane, usually confined to that of the coronary cushion, the ergots and the chestnuts, but sometimes extending to that of the frog and the sole, characterized by a malsecretion of the affected membrane similar to that observed in canker.

Diseases of the Horse's Foot Harry Caulton Reeks

-- This is the portion of the keratogenous membrane covering the plantar surface of the os pedis and the plantar cushion.

Diseases of the Horse's Foot Harry Caulton Reeks

The horn of the wall must be removed, and the diseased structures, whether gangrenous keratogenous membrane, necrosed ligament, or carious bone, carefully excised or curetted.

Diseases of the Horse's Foot Harry Caulton Reeks

The altered character of the horn is accounted for by the inflammatory changes in the sensitive laminæ and the papillæ of the keratogenous membrane generally, for it follows as a matter of course that these tissues, themselves in a diseased condition, must naturally produce a horn of a greatly altered and inferior quality.

Diseases of the Horse's Foot Harry Caulton Reeks

This cavity points out the exact spot where the force of the injury has been greatest, where death of certain cells of the keratogenous membrane has resulted, and where the natural formation of horn has for a time been suspended.

Diseases of the Horse's Foot Harry Caulton Reeks

Posteriorly the cavity is bounded by the front of the os pedis, and is lined by a thin growth of horn secreted by the keratogenous membrane covering the bone.

Diseases of the Horse's Foot Harry Caulton Reeks

Portions of this loose horn removed reveal beneath it a caseous foetid matter, easily removed by scraping (the perverted secretion of the keratogenous membrane).

Diseases of the Horse's Foot Harry Caulton Reeks

Extensive slit-like cuts in this region, when deep enough to lacerate the keratogenous membrane, are sometimes followed by the growth of a fissure in the horn, and what might almost be termed a permanent sand-crack results.

Diseases of the Horse's Foot Harry Caulton Reeks

The superficial layer of the keratogenous membrane in which we have judged the disease to exist is, after all, but a delicate structure.

Diseases of the Horse's Foot Harry Caulton Reeks

In place of the normal horn, however, is often found a hypertrophy of the elements of the keratogenous membrane leading to huge fungoid-looking growths with a papillomatous aspect, damp in appearance and offensive in smell, and readily bleeding when injured (see Fig. 131).

Diseases of the Horse's Foot Harry Caulton Reeks