EQUINE SARCOID. CLINICAL, ETIOLOGICAL AND ANATOMOPATHOLOGICAL ASPECTS

Abstract

Equine sarcoid is the most frequent cutaneous neoplasia among equidae. Its clinic behaviour is locally aggressive due to its infiltrative capacity as well as being resistant to different forms of therapy. Morphologically, equine sarcoid is a predominantly fibrous tissue neoplasia, originally fibroblastic and without metastasis, often showing the involvement of epidermis, thus being recognized as a biphasic tumor. In its clinical presentation, several types and subtypes of equine sarcoids are recognized, being described as hidden, verrucous, fibroblastic, malignant and mixed. Etiology of equine sarcoid is related to infection through BPV1 and BPV2, however this neoplasia must be considered as a tumor which is induced by virus, with a wide range of resulting manifestations of interactions between the etiologic agent, the environment and the host genome. The objective of this article is to draw an updated panel over the epidemiologic, clinical-pathological and etiologic characteristics of the equine sarcoid.