Pastern leukocytoclastic vasculitis

This past week has just flown and weekend did too.

I have had my head in my books, well computer really, trying to get the summer project for my osteopathy course finished. Its has been on show jumping competitions,something I didn't know much about except the physical problems horse can have as a result.
I has been very interesting and I have had some great help along the way.
Yesterday the last show I had to attend was the novice show in Chabanais, Charente.
The ring was in fact the rugby pitch, a beautiful flat mown lawn, perfect ground and a very pleasant atmosphere it was a really nice way to get beginners introduced to show jumping. If I am ever mad enough to want to I would start here.

Apples leg still has not improved, I believe it is a condition being made worse by the sun. I have found a good article on the UC Davies website which sounds just the same, if you get chance look at their website it is a fantastic source of information.

"Pastern leukocytoclastic vasculitis
(photoaggravated vasculitis) is a relatively common but poorly understood disease. It generally affects mature horses and produces lesions confined to the lower extremities that lack pigment. Lesions are multiple and well marked. Initially, erythema (redness), exudation (oozing) and crusting open sores develop, followed by swelling of the affected limb(s). Chronic cases may develop a rough or warty” surfaceod vessels)

The cause of pastern leukocytoclastic vasculitis is not yet known, but an immune component is
possible. The fact that the lesions are limited to nonpigmented areas of the skin suggests a role
for UV radiation. Drug reactions may play a role, and a recent report has implicated a Staphyloccus bacterial infection as a possible cause.


A diagnosis is made based on skin biopsy of the affected area, which would show leukocytoclastic vasculitis (inflammation of the blood vessels) with vessel wall degeneration and clots involving the small vessels in the superficial dermis. Treatment may consist of systemic corticosteroids at relatively high doses for two weeks and reduced doses for
another four to six weeks. A reduction in UV light exposure may be helpful, either by bandaging
affected legs or stabling inside during daylight hours or both.ulcerations develop predominantly in the rear of the pastern region. The ulcerations are covered with adherent crusts. Over time, the lesions extend up the leg and affect the skin as high as the knees or hocks. "

So if anyone has any ideas or has experienced this before your advice would be welcome.