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Skin cancer, or neoplasia, is the most common type of cancer diagnosed in horses, accounting for 45 [1] to 80% [2] of all cancers diagnosed. Sarcoids are the most common type of skin neoplasm and are the most common type of cancer overall in horses. Squamous-cell carcinoma is the second-most prevalent skin cancer, followed by melanoma. [3]
Equine sarcoid, a naturally occurring skin tumour affecting horses, donkeys and mules, is associated with strains of BPV-1/2 which may be equine specific. [11] The lesions can occur anywhere on the body, often multiply, with the limbs, thorax–abdomen, head and paragenital areas being particularly commonly affected.
An equine melanoma is a tumor that results from the abnormal growth of melanocytes in horses. Unlike in humans, melanomas in horses are not thought to be caused by exposure to ultraviolet light. [1] Melanomas are the third most common type of skin cancer in horses, with sarcoids being the first most prevalent and squamous-cell carcinoma being ...
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Sarcoid may refer to: Sarcoidosis , a multi-organ immune system disorder characterised by non-necrotising granulomas commonly affecting the lungs and eyes Equine sarcoids or sarcoids, common, usually benign, skin tumours of horses and other equidae which have several different forms
Scar sarcoid (also known as "Sarcoidosis in scars") is a cutaneous condition characterized by infiltration and elevation of tattoos and old flat scars due to sarcoidosis. [2]: 710 Mucosal sarcoidosis is a cutaneous condition characterized by pinhead-sized papules that may be grouped and fused together to form a flat plaque. [2]: 711
Signs and symptoms of sarcoidosis [16] Sarcoid affecting the skin Sarcoidosis is a systemic inflammatory disease that can affect any organ, although it can be asymptomatic and is discovered by accident in about 5% of cases. [ 17 ]
Sarcoid granulomas often contain star-shaped structures called asteroid bodies or lamellar structures termed Schaumann bodies, but these structures are not specific for sarcoidosis. [10] Sarcoid granulomas can resolve spontaneously without complications or heal with residual scarring.