🧬 Vet Guide 2025: Understanding Meibomian Gland Tumors in Dogs 🐶

By Dr Duncan Houston, BVSc

👁️ The Meibomian glands are small but mighty structures located along your dog’s eyelids. They secrete the oily component of the tear film, which helps prevent tear evaporation and keeps your pet's eyes moist and healthy. However, these glands can sometimes give rise to small tumors or overgrowths, particularly in older dogs. Let’s explore everything pet parents need to know in 2025 about this common condition.

🧪 What Are Meibomian Gland Tumors?

These tumors appear as small bumps along the eyelid, either on the inside or outside. They are typically benign growths known as Meibomian adenomas, caused by overgrowth or blockage of the gland. While most are harmless, they can become problematic if:

• 🔄 They rub against the cornea and cause irritation or ulcers
• 🌱 They grow large enough to interfere with blinking
• 😿 They become infected or ulcerated

📌 These tumors are most commonly seen in dogs over 8 years old, and while any breed can develop them, older dogs are particularly prone.

📈 Are They Cancerous?

Most Meibomian tumors are benign, but rarely, they can become malignant—a type known as sebaceous adenocarcinoma. These may spread to lymph nodes and behave more aggressively. If a tumor changes in size, color, or becomes painful, it’s time to see your vet for further assessment.

⚠️ Keep an eye out for:

• 🚩 Rapid enlargement
• 💢 Ulceration or bleeding
• 😖 Discomfort, squinting, or blinking

🔬 Diagnosis and Monitoring

Many benign masses are diagnosed visually during an exam, but for any suspicious growth, your veterinarian may recommend a biopsy or surgical removal followed by histopathology. Regular monitoring is crucial to detect any changes that may indicate malignancy or need for removal.

💉 Treatment Options

Treatment is typically based on size, location, and behavior of the tumor:

1. 🧵 Traditional Surgery

The mass and affected gland are removed under general anesthesia. Stitches are placed to close the incision, and most dogs recover within a week.

2. 💡 Laser Surgery

Laser techniques offer a bloodless incision with faster healing. Protective shields are used to guard the cornea, and stitches are still often required.

3. ❄️ Cryosurgery

This technique freezes tissue, causing the mass to slough off naturally. It’s effective for small tumors or as a clean-up step after standard excision.

4. 🧴 Medical Management

For elderly pets who aren’t good candidates for anesthesia, lubricating drops can help reduce corneal friction and irritation from the mass. This doesn’t eliminate the tumor but can improve comfort.

🦴 Post-Op Care

• 🔵 Expect some bruising and swelling post-surgery
• 📆 Healing typically takes 7–10 days
• 🩺 Use prescribed topical antibiotics or drops as instructed
• 🔔 Your dog will likely need an Elizabethan collar (cone) to prevent scratching

🔄 Recurrence Risk

Only about 10% of Meibomian tumors recur. If recurrence happens, it typically shows up within 6 months of surgery. Regular follow-ups and monitoring can help catch regrowth early.

🧬 Is It Hereditary?

There’s no definitive link to genetics, but because these tumors are more common in senior dogs, it’s likely a result of age-related glandular changes rather than inherited traits. Still, regular eye checks become more important as your dog ages. 🧓🐶

🔍 When to Call the Vet

📞 Contact your vet if:

• ➡️ The mass grows, bleeds, or ulcerates
• ➡️ Your dog begins squinting, rubbing their eye, or avoiding light
• ➡️ You notice changes in eye discharge or swelling

📅 Prevention and Outlook for 2025

While you can’t prevent Meibomian tumors, early detection is key. With regular eye checks, prompt veterinary care, and proper treatment, most dogs lead long, happy lives—fully sighted and pain-free. 🐕💖

📲 Need expert advice on your dog’s eye health? Reach out to AskAVet.com or download the Ask A Vet app for trusted 24/7 pet care support. 🩺📱