TUMORS OF THE ORBIT.
These may be of different kinds, as sarcoma, encephaloid, osteoma and actinomycosis. They demand thorough surgical treatment, except perhaps in the case of the latter, which may recover under iodide of potassium. Emmerich records an extensive sarcoma of the orbit in a cow, weighing six pounds and extending into the nasal sinuses, and chambers, and implicating the cerebral meninges. Möller records cases of sarcoma and carcinoma of the orbit in horses and dogs, and Leblanc in cattle. Melanosarcoma is not uncommon in the orbits of gray horses which are changing to white.
Exotoses are common around the orbits of cattle.
If such growths do not show on the surface they cause a more or less unsightly protrusion of the eyeball, owing to the presence of the neoplasm in the depth of the orbit, and the removal of the bulb becomes a necessity.