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Sarcoids (or angleberries) are the most common tumours of horses and a viral cause is suspected. They are locally invasive tumours of the skin, which can remain small and dormant for many years before undergoing change and rapid growth. Most horses (>84%) will have many lesions as opposed to solitary sarcoid. Sarcoids do not metastasise. Sarcoids can occur in horses, donkeys and mule, and most commonly seen in animals between 1 and 4 years of age.
Some parts of the body are more susceptible than others. These include the eyelids, limb and the underside of the body and in male animals inside the sheath and on the penis. Site and position of sarcoids is very important for performance and as such lesions in the eyelid and girth region can be very irritating and cause problems with tack.
Sarcoids can develop along blood lines although there are no noted breed, age, sex or coat colour predispositions. Arabs have been showed to be more predisposed to sarcoids than other breeds.
There are 6 types of sarcoids:
Sarcoids can be small innocuous lesions however they should never be underestimated and treatment not undertaken lightly.
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The advice given in any of our web pages cannot be used as the basis for a diagnosis or choice of treatment.
Clyde Vet Group advises that you should always consult a veterinary surgeon about any queries with animals under your care.
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