Sarcoids

Equine Sarcoid

“…Only in one recent study on a population of Franches-Montagnes horses in Switzerland has a high proportion of spontaneous remission been observed [53]. The mechanisms for spontaneous regression are not clear and antibodies have been detected only in donkeys [5].…”

“…All breeds can be affected but Quarter Horses, Appaloosas, and Arabian horses are reported to be at greater risk than Thoroughbreds. Standardbreds have an even lower risk of developing sarcoids [5,44,45]. Certain equine families have an increased prevalence of sarcoid lesions and an association between the disease and equine leukocyte antigen (ELA) alleles has been observed in several breeds.…”

“…Micro-trauma due to injections (Figure 1) or even insect bites can be followed by sarcoid development, even long after apparent healing. Furthermore, sarcoids are a well-recognized possible complication and cause for delayed healing in both traumatic and surgical wounds in horses [2,5,51].…”

“…Reported percentages of sarcoid among skin diseases and skin neoplasms vary from 13% to 90% and 8% to 38% when considering ocular neoplasms. There are also some geographical variations that may correlate with variations of risk factors, including the presence of cattle and vectors near horses [1,[4][5][6]. Horses of all breeds and colors can develop the disease at any age, most presenting a first lesion between 2 and 9 years of age.…”

“…Horses of all breeds and colors can develop the disease at any age, most presenting a first lesion between 2 and 9 years of age. There is no demonstrated sex predilection, although geldings seem to be overrepresented [3,5,7]. Data about the incidence of sarcoids in the population are available only for donkeys and not for horses [8].…”