Neoplastic Diseases
Primary and metastatic neoplasms of bone and muscle are rare in goats. There are reports of an osteochondrosarcoma in the rib and sternum of a goat (Cotchin 1960), an osteogenic sarcoma at a previously repaired fracture site in the humerus of a 10-year-old Toggenburg wether, and an osteoma of the mandible in a 10-year-old female Toggenburg cross goat that resulted in dislocation of the jaw (Steinberg and George 1989).
An extraskeletal osteosarcoma, presenting as a large thoracic mass in a 16-year-old goat with signs of respiratory and cardiovascular compromise, has also been reported (Braun et al. 2011)Several non-bony tumors have been reported to affect the mandible or maxilla of goats, resulting in visible distortion of the face, dislocation of teeth, dysphagia, or stridor if the maxillary sinus is involved. These include oral adenocarcinoma (Lane and Anderson 1983), ossifying fibroma (Pritchard 1984), non-ossifying fibroma (Murphy et al. 2011), nasal papillary adenoma (Pringle et al. 1989), and lymphosarcoma (Craig et al. 1986). The latter has also been found to infiltrate the marrow of long bones.