Page 906 - The Veterinary Care of the Horse

squamous cell carcinoma of the eyelids.

VetBooks.ir Diagnosis

Diagnosis is obvious from the clinical signs. If there is any suggestion of cancerous or
precancerous changes on the eyelids, a biopsy should be performed.

Management and treatment

There is no treatment for vitiligo. Where the eyelids are irritated by the sun, stabling the

horse by day or the use of protective goggles or masks should help. If the skin is inflamed or
the horse has conjunctivitis, your vet will prescribe a suitable ointment. Hypoallergenic sun
blocks are useful but care should be taken not to put it into the eye itself. A small amount

should be applied to a test patch first to check there is no allergic reaction.

Affected horses should not be used for breeding as the condition can be inherited.

ACQUIRED SKIN DEPIGMENTATION

It is not uncommon for white hairs to grow when skin has been injured. Common causes

include:
• pressure from ill-fitting saddles, rugs, over-tight bandages etc

• cold, e.g. freeze branding, cryosurgery

• chemicals, e.g. blisters

• rubber toxicity from bits and cruppers can lead to depigmentation of the corners of the
mouth and the dock.

Such blemishes are often permanent.