Neoplasms In Equine Species In Sharkia Governorate, Egypt

Abstract

E quine neoplasia leads to economic losses which ranged from undesirable effects on the animal's skin to locomotors and reproductive dysfunctions. Equine sarcoid is considered to be one of the most prevalent skin affections in equids (Chambers et al., 2003). It represents nearly 20% of equine tumors and about 90% of equine skin neoplasia. Although it had a low mortality rate, it has a direct effect on the material value of horses and may lead to lameness according to their locations (Goodrich et al., 1998). (Valentine, 2006) recorded the most common neoplasms in equine populations as the following; sarcoid (51.4%), squamous cell carcinoma (SCC) (18.3%) beside melanocytic tumors, papillomas, and mast cell tumors were, constituting (17.8%). while, lymphoma, fibrosarcoma, fibroma, schwannoma, hemangiosarcoma, lipoma, malignant mela-

Metastatic cutaneous myxosarcoma in an adult horse

“…1 This tumor belongs to the category of soft tissue sarcomas (STS), originating from mesenchymal cells of connective tissue, sharing clinical behavior and histopathologic aspects with other mesenchymal-origin neoplasms. 2,3 Although rare in equids, myxosarcoma has been reported in horses [4][5][6] and donkeys, 7 but has never been reported in mules and zebras. Therefore, it should be considered as a differential diagnosis when there is the presence of a rapidly growing cyst or mass with local invasiveness and signs of pronounced osteolysis.…”