Sarcoids are the most common skin tumour affecting horses. They are a serious concern as they can be aggressive and locally invasive, although they do not spread or “metastasize” to internal organs. Sarcoids are often unpredictable, and treatment is not necessarily straightforward.
There are 6 different forms of sarcoids which are described based on their appearance. Sarcoids may vary from a flat, scaly/hairless area, to a nodular, ulcerated growth, and anywhere in between. They may occur anywhere on the body, although the head, belly and chest are frequently affected areas. Old skin injuries, particularly on the legs, are also common sites for sarcoids.
Diagnosis is usually made on examination and history of lesions. Biopsy is often definitive although the risk of traumatising and triggering expansion of the lesion should be considered.
There is no magic cure although a gamut of treatment options are available including: surgical removal, cryotherapy, immune therapy, radiation therapy, and/or topical treatments. Treatment choice will depend on the history, position and size of the sarcoid/s, as well as budget.
The risk of reoccurrence is high.
What can you do?
Inspect your horse closely and regularly to aid in identifying suspicious lesions early. Avoid purchasing a horse with suspicious lesions and always consult your vet if concerned.
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