Meibomian Gland Cyst In Dogs. These glands produce the thick mucoid part of the tears. Tumor mass in the left upper lid margin

It is more common in dogs than cats. (meibomian glands are sebaceous glands that provide an oily secretion to stabilize the tear film over the cornea.) common in older dogs, meibomian gland tumours are usually benign, but a small percentage of them are carcinomas that can. Meibomian gland adenoma and adenocarcinomathese masses arise from meibomian glands, which are specialized glands that line the upper and lower eyelids.meibomian glands secrete oily substances that help keep the tear film healthy.