The most common tumor of the eyelid is a meibomian gland adenoma. Meibomian glands are found only on the eyelids. These glands secrete an oil that acts as a barrier to prevent the evaporation of tears. Meibomian gland adenomas have a cauliflowerlike appearance and may be single or multiple.
Among other eyelid tumors, the most common is the sebaceous adenoma. Most are benign, and are found in older dogs.
Papillomas are wartlike tumors caused by the canine oral papilloma virus. These tumors also grow on the surface of the eye.
Treatment: Eyelid tumors should be removed to prevent injury to the cornea. The tumors mentioned here are not usually malignant tumors.